<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:googleplay="http://www.google.com/schemas/play-podcasts/1.0"><channel><title><![CDATA[Harnessing the Power of Nutrients: The Masterjohn Q&A Files]]></title><description><![CDATA[We use Zoom, a video chatting software, in webinar mode. You can ask your question anonymously in text, but you can also ask it publicly, and you can even get "on stage" and share your mic, web cam, or screen with everyone.]]></description><link>https://chrismasterjohnphd.substack.com/s/the-masterjohn-q-and-a-files</link><image><url>https://substackcdn.com/image/fetch/$s_!YRVc!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F0ccb5358-b913-4bf5-8262-184dfd1b7bf6_1280x1280.png</url><title>Harnessing the Power of Nutrients: The Masterjohn Q&amp;A Files</title><link>https://chrismasterjohnphd.substack.com/s/the-masterjohn-q-and-a-files</link></image><generator>Substack</generator><lastBuildDate>Wed, 22 Apr 2026 23:27:51 GMT</lastBuildDate><atom:link href="https://chrismasterjohnphd.substack.com/feed" rel="self" type="application/rss+xml"/><copyright><![CDATA[Chris Masterjohn, PhD]]></copyright><language><![CDATA[en]]></language><webMaster><![CDATA[chris@chrismasterjohnphd.com]]></webMaster><itunes:owner><itunes:email><![CDATA[chris@chrismasterjohnphd.com]]></itunes:email><itunes:name><![CDATA[Chris Masterjohn, PhD]]></itunes:name></itunes:owner><itunes:author><![CDATA[Chris Masterjohn, PhD]]></itunes:author><googleplay:owner><![CDATA[chris@chrismasterjohnphd.com]]></googleplay:owner><googleplay:email><![CDATA[chris@chrismasterjohnphd.com]]></googleplay:email><googleplay:author><![CDATA[Chris Masterjohn, PhD]]></googleplay:author><itunes:block><![CDATA[Yes]]></itunes:block><item><title><![CDATA[330: Is Whole Food Vitamin C Really Different?]]></title><description><![CDATA[Watch now (23 mins) | Masterjohn Q&A Files Episode 330]]></description><link>https://chrismasterjohnphd.substack.com/p/330-is-whole-food-vitamin-c-really</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/330-is-whole-food-vitamin-c-really</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 18 Dec 2023 15:00:59 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/512ed425-eb31-4e5b-b098-409b43bdfb50_4200x3000.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>Is whole food vitamin C superior to natural because it is part of a tyrosinase complex?<strong><br></strong><br><strong>Short Answer: </strong>Vitamin C is nearly ubiquitously distributed in plant tissues, and is never bound to any enzyme as a structural complex. Vitamin C promotes absorption of iron from plant foods, inhibits copper absorption, and de-loads copper from ceruloplasmin, which may play a role in distributing copper to tissues. Vitamin C is not capable of destroying ceruloplasmin. These functions follow directly from vitamin C as an electron donor and there is no evidence whatsoever that whole food vitamin C behaves differently in these respects than synthetic vitamin C. However, daily needs in most contexts are 2-400 milligrams of vitamin C per day, which is below the dose shown to potentially cause problems with copper. Getting this from whole foods or whole food supplements is better than using synthetic vitamin C because it avoids GMO corn and Chinese synthetics and provides a host of other beneficial constituents alongside the vitamin C.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-june-a55">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8a3bdcc9415a798a5cfda45c9c&quot;,&quot;title&quot;:&quot;Is Whole Food Vitamin C Really Different? | Masterjohn Q&amp;A Files #330&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/0AItg683fJ8lIjvYUKtinE&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/0AItg683fJ8lIjvYUKtinE" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[329: What's the Deal With Seed Oils?]]></title><description><![CDATA[Masterjohn Q&A Files Episode 329]]></description><link>https://chrismasterjohnphd.substack.com/p/329-whats-the-deal-with-seed-oils</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/329-whats-the-deal-with-seed-oils</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 04 Dec 2023 15:00:49 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/c99bd2ed-ee86-4ae3-b671-b9e97e8e4514_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>What Is the Real Issue With Seed Oils?<br><br><strong>Short Answer: </strong>The main issue with seed oils is that they present an oxidative liability. They do not acutely cause oxidative stress, but their polyunsaturated fatty acids (PUFAs) are more vulnerable than any other macronutrient to oxidative damage. Oxidative stress can increase because of nutrient deficiencies, toxins, infections, other sources of inflammation, alcohol, or smoking, and it will inevitably increase as a function of aging. As oxidative stress increases, more PUFAs in the tissues mean more damage. At least 0.6 milligrams of vitamin E should be gotten per gram of PUFA in the diet, but vitamin E cannot fully protect against PUFA, so their intake should be moderated to the very low levels needed, as obtained by eating fatty fish once or twice a week, eating eggs daily, and eating 4-8 ounces of liver per week. Additional secondary problems with them include residual solvents and heat damage prior to intake, but the main issue is that we do not want to increase our tissue PUFA content more than needed.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-june-a55">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8a3bdcc9415a798a5cfda45c9c&quot;,&quot;title&quot;:&quot;What's the Deal With Seed Oils? | Masterjohn Q&amp;A Files #329&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/6CVF8jUTTp21exOm4DtTFD&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/6CVF8jUTTp21exOm4DtTFD" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[328: Is Hair Mineral Testing Useful?]]></title><description><![CDATA[Watch now (24 mins) | Masterjohn Q&A Files Episode 328]]></description><link>https://chrismasterjohnphd.substack.com/p/328-is-hair-mineral-testing-useful</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/328-is-hair-mineral-testing-useful</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 20 Nov 2023 15:00:35 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/c9793f3e-c0d3-4d73-85f0-0d46fbe21282_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question:</strong> How useful is hair trace mineral analysis (HTMA) for nutritional testing?<br><strong><br>Short Answer: </strong>Hair trace mineral analysis is included as an optional add-on in the comprehensive nutritional screening from Testing Nutritional Status: The Ultimate Cheat Sheet, because it can capture data for some ultra-trace minerals for which there are no better-validated tests, and it might capture a pattern that might not be picked up as quickly with blood work, such as a mineral transport issue. However, its utility is limited by the fact that hair mineral content is not well validated as a test for any specific mineral, is generally anti-validated when there is enough science on a mineral (such as zinc, where hair zinc does not go down in deficiency), and should not be used as a central piece of data without corroboration from other more well-validated tests, which exist for most of the nutrients.<br><br>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-june-a55">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8a3bdcc9415a798a5cfda45c9c&quot;,&quot;title&quot;:&quot;Is Hair Mineral Testing Useful? | Masterjohn Q&amp;A Files #328&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/7mPdXrgTPb6wk2c8rSCEUz&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/7mPdXrgTPb6wk2c8rSCEUz" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[327: How to Find the Root Cause of Autoimmunity?]]></title><description><![CDATA[Watch now (21 mins) | Masterjohn Q&A Files Episode 327]]></description><link>https://chrismasterjohnphd.substack.com/p/327-how-to-find-the-root-cause-of</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/327-how-to-find-the-root-cause-of</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 06 Nov 2023 15:00:54 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/153922f7-88a6-4558-abd7-7ea7786c0285_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>How do we find the root cause of an autoimmune condition? One example considered where the root cause is energy metabolism.<strong><br></strong><br><strong>Short Answer: </strong>Autoimmune conditions are likely driven by deficiencies of vitamins A and D, which contribute to post-infectious autoimmunity by compromising the rhythmic rise and fall of myeloid-derived suppressor cells (MDSCs), and to autoimmunity regardless of infections through impaired suppression of Th17 helper T cells. More broadly, infections and tissue damage are the most likely drivers of autoimmunity onset. However, energy metabolism governs everything through the second law of thermodynamics, which holds that energy must be used to prevent everything from randomly mixing, and this includes randomly mixing the immune defense against pathogens with immune attacks on the host. In this example, we discuss how a respiratory chain disorder would compromise absorption and distribution of zinc and compromise the oxidation of NADH to NAD+, and how both of these would interact with a genetic impairment in acetaldehyde dehydrogenase to prevent the activation of vitamin A to retinoic acid. Autoimmunity thus results as one of many symptoms of vitamin A deficiency driven not by lack of vitamin A, but rather by impaired activation of vitamin A, secondary to impaired energy metabolism.&nbsp;</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-may">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8a3bdcc9415a798a5cfda45c9c&quot;,&quot;title&quot;:&quot;How to Find the Root Cause of Autoimmunity? | Masterjohn Q&amp;A Files #327&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/7xjvJgs0IIsHywLhz8wp2m&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/7xjvJgs0IIsHywLhz8wp2m" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[326: Why Would Vitamin C cause muscle pain, joint pain, and brain fog?]]></title><description><![CDATA[Masterjohn Q&A Files Episode 326]]></description><link>https://chrismasterjohnphd.substack.com/p/326-why-would-vitamin-c-cause-muscle</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/326-why-would-vitamin-c-cause-muscle</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 23 Oct 2023 14:00:17 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/afd4ffc4-bebd-4399-b4e8-2bfe774501e0_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>Why Would Vitamin C Cause Joint Pain, Muscle Pain, and Brain Fog?<strong><br></strong><br><strong>Short Answer: </strong>Acutely, vitamin C would likely cause these effects by generating oxalate, which could cause crystals that lead to muscle and joint pain, and could cut energy metabolism in half, leading to brain fog. This vulnerability could result from deficiencies of any of the B vitamins, any of the electrolytes, or of iron, copper, or sulfur; from diabetes, low adrenals, or hypothyroidism; or from any of the hundreds of genetic defects in energy metabolism, only one of which is glucose 6-phosphate dehydrogenase deficiency; or any one of a huge number of toxins that impair energy metabolism. Chronically, vitamin C may increase the harms of iron overload or contribute to copper deficiency. The main ways to manage these latter issues are to take vitamin C away from meals, to maintain good copper status through proper dietary intake, and to treat iron overload with phlebotomy.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-may">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8a3bdcc9415a798a5cfda45c9c&quot;,&quot;title&quot;:&quot;Why Would Vitamin C cause muscle pain, joint pain, and brain fog? | Masterjohn Q&amp;A Files #326&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/16DvnHpRpTqk07UHlpCt2J&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/16DvnHpRpTqk07UHlpCt2J" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[325: Can NAC hurt your gut health?]]></title><description><![CDATA[Watch now (41 mins) | Masterjohn Q&A Files Episode 325]]></description><link>https://chrismasterjohnphd.substack.com/p/325-can-nac-hurt-your-gut-health</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/325-can-nac-hurt-your-gut-health</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 09 Oct 2023 16:14:29 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/b4be228e-b052-4638-8ecc-7ef3d24b2fdd_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question:</strong> Can NAC Hurt Gut Health When Used to Disrupt Biofilms?<br><strong><br>Short Answer: </strong>N-acetylcysteine or NAC can be used at a dose of 600 to 2,400 milligrams per day for 5-10 days to disrupt biofilms and make it easier for antimicrobials to kill bacteria. Animal studies suggest that acute doses up to 6 grams do not deplete mucus or cause ulceration, but that an acute dose of 17.5 grams can deplete mucus and cause ulcers within two hours. Human studies suggest that 10 grams per day can be used for 24 weeks with fewer than 1 in 6 people complaining of gastrointestinal side effects. Yet, chronic use of NAC will thin the mucus, disrupt the biofilms used by normal healthy microbiota, and possibly deliver excessive sulfur to certain components of the microbiome. Therefore, I would not use it except for specific, targeted reasons, and I would not use it at a dose higher than needed or for a duration longer than needed.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-may">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8a3bdcc9415a798a5cfda45c9c&quot;,&quot;title&quot;:&quot;Can NAC hurt your gut health? | Masterjohn Q&amp;A Files #325&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/0JrbR8n08PVjeys2pQqEPF&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/0JrbR8n08PVjeys2pQqEPF" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[324: How can I protect against oxalates?]]></title><description><![CDATA[Masterjohn Q&A Files Episode 324]]></description><link>https://chrismasterjohnphd.substack.com/p/324-how-can-i-protect-against-oxalates</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/324-how-can-i-protect-against-oxalates</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 25 Sep 2023 14:00:13 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/5e501288-2c96-45b6-b9f8-8321217bd5a7_4200x3000.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>How can I protect against oxalates?<br><strong><br>Short Answer: </strong>Getting 300-400 mg calcium between food and supplements at each meal will minimize oxalate absorption. Maintaining postprandial urine pH in the 6.4-6.8 range by getting 3-5 grams of potassium per day from food or from organic acid salts such as potassium citrate will prevent its crystallization in the kidney. Reducing dietary oxalate will prevent any possible damage in the gut.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-april">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;How can I protect against oxalates? | Masterjohn Q&amp;A Files #324&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/4DQVoVkCm2zKJyJNiBcU8n&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/4DQVoVkCm2zKJyJNiBcU8n" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[323: Why Should Postprandial Glucose Be Kept Under 140 mg/dL?]]></title><description><![CDATA[Watch now (10 min) | Masterjohn Q&A Files Episode 323]]></description><link>https://chrismasterjohnphd.substack.com/p/323-why-should-postprandial-glucose</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/323-why-should-postprandial-glucose</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 11 Sep 2023 14:00:19 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/f947f289-5c19-4e7b-9eca-b1ee7bfd4a73_4200x3000.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>Why should postprandial blood glucose be kept under 140 milligrams per deciliter?<br><strong><br>Short Answer: </strong>When blood glucose rises above 140 mg/dL, this is the approximate point at which it spills into the polyol pathway at a greater-than-normal rate, which represents a suboptimal state of metabolism that is likely to hurt antioxidant status and compromise detoxification pathways as well as the recycling of vitamin K and folate. It must be kept in mind that a healthy person will adapt to glycemic loads they consume regularly. Thus, a one-time spike above 140 mg/dL should never be used to conclude anything whatsoever. Only repeated spikes above this level with repeated consumption of the same glycemic load over several days to several weeks should be used as a cause for concern.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-april">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;Why Should Postprandial Glucose Be Kept Under 140 mg/dL?  | Masterjohn Q&amp;A Files #323&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/30dzZ71cryOJmtvwVfq5nC&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/30dzZ71cryOJmtvwVfq5nC" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[322: What is the relationship between copper and estrogen?]]></title><description><![CDATA[Masterjohn Q&A Files Episode 322]]></description><link>https://chrismasterjohnphd.substack.com/p/322-what-is-the-relationship-between</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/322-what-is-the-relationship-between</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 28 Aug 2023 14:01:07 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/eebdfee1-9edc-4a8b-8bc2-12e21e371ac3_4200x3000.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>What is the relationship between copper and estrogen?</p><p><strong>Short Answer: </strong>Estrogen moves copper from the mother&#8217;s bloodstream to the fetus during pregnancy. Its action at the intestines is poorly understood but I believe estrogen and progesterone interact to promote intestinal copper absorption. Maintaining pregnancy-level hormones while not pregnant poses a risk of promoting too much absorption of copper from food without transferring it to a growing baby. Copper status should be monitored when using supplemental hormones to avoid copper toxicity.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-march">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;What is the relationship between copper and estrogen? | Masterjohn Q&amp;A Files #322&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/5h33p3DiqkRDGqPDOOpXVJ&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/5h33p3DiqkRDGqPDOOpXVJ" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[321: How to slow or reverse graying of hair?]]></title><description><![CDATA[Masterjohn Q&A Files Episode 321]]></description><link>https://chrismasterjohnphd.substack.com/p/321-how-to-slow-or-reverse-graying</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/321-how-to-slow-or-reverse-graying</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 14 Aug 2023 14:00:23 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/8236512e-3ecc-4499-a905-0bcf2617db35_4200x3000.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>How to slow greying of hairs and potentially reverse it?</p><p><strong>Short Answer: </strong>What works for any given individual will likely be to find the weakest link and fix it, from among the following systems: the signaling of energy abundance (body fat, insulin sensitivity, thyroid hormone, adequate protein, individualized meeting of carbohydrate needs, good management of psychosocial stress, supporting neuroendocrine signaling with copper, vitamin C, zinc, and glycine, and supporting thyroid function with iodine and selenium); the biochemical infrastructure of energy production (all the B vitamins, iron, copper, sulfur, magnesium, potassium, and managing genetic idiosyncrasies impacting energy metabolism), and antioxidant protection (protein, vitamin C, vitamin E, zinc, copper, selenium, iron, and manganese).</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-march">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;How to slow or reverse graying of hair? | Masterjohn Q&amp;A Files #321&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/4tFWbCnAc2phTOCfU8Gqus&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/4tFWbCnAc2phTOCfU8Gqus" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[320: How Much Iron Can We Absorb At Once?]]></title><description><![CDATA[Watch now (28 min) | Masterjohn Q&A Files Episode 320]]></description><link>https://chrismasterjohnphd.substack.com/p/320-how-much-iron-can-we-absorb-at</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/320-how-much-iron-can-we-absorb-at</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 31 Jul 2023 14:00:53 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/88aeadca-b9fa-424a-ab03-9d023f6087ee_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question:</strong> How much iron can we absorb at once?</p><p><strong>Short Answer: </strong>High-dose iron will produce more total absorbed iron, but will also leave more in the gut, which could cause constipation or disturb the gut microbiome. If desperate for quick relief, 200 milligrams per day of iron taken in the morning will work faster than lower doses or the same dose taken in the afternoon. For most people, however, I believe it is best to start with 18 milligrams of iron, and only increase it to 27 or 36 milligrams, or higher, if needed. If it is difficult to raise iron with a supplement, try eating a temporary carnivore diet that includes egg yolks but not whites, or at least try taking your iron with a breakfast that matches this description.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-february">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;How Much Iron Can We Absorb At Once? | Masterjohn Q&amp;A Files #320&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/5dOVUltXptNR6VzGzVneSH&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/5dOVUltXptNR6VzGzVneSH" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe>
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   ]]></content:encoded></item><item><title><![CDATA[319: What cofactors are needed to synthesize and recycle BH4?]]></title><description><![CDATA[Watch now (22 min) | Masterjohn Q&A Files Episode 319]]></description><link>https://chrismasterjohnphd.substack.com/p/319-what-cofactors-are-needed-to</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/319-what-cofactors-are-needed-to</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 17 Jul 2023 14:01:18 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/de35fc5e-b850-4646-8508-ecfad8246d4e_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question:</strong> What cofactors are needed to synthesize and recycle BH4?<br><br><strong>Short Answer: </strong>Zinc, magnesium, potassium, and niacin are the cofactors needed for the synthesis and recycling of BH4. Folate and methylation are not involved, though high-dose folate or folic acid could hypothetically hurt BH4 recycling since both are recycled by dihydrofolate reductase (DHFR).</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-february">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;What cofactors are needed to synthesize and recycle BH4? | Masterjohn Q&amp;A Files #319&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/0zRMG0Tf0uT9cQXauZLgXA&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/0zRMG0Tf0uT9cQXauZLgXA" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe>
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   ]]></content:encoded></item><item><title><![CDATA[318: Is It Important to Get Vitamin D Sulfate Specifically From the Sun?]]></title><description><![CDATA[Watch now (28 min) | Masterjohn Q&A Files Episode 318]]></description><link>https://chrismasterjohnphd.substack.com/p/318-is-it-important-to-get-vitamin</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/318-is-it-important-to-get-vitamin</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 03 Jul 2023 14:00:38 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/c285cf1c-d860-4365-b092-99f0658b55cb_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>Is it important to get vitamin D sulfate specifically from the sun?<strong><br><br>Short Answer: </strong>It is important to get morning outdoor sunlight as close to every day as possible for your circadian rhythm, and to get some exposure to unprotected sunlight during the day when UV is available, but at doses less than needed to cause reddening, and it is equally important to always avoid burning. There are many reasons for this, and the cholesterol sulfate hypothesis &#8212; to which the vitamin D sulfate hypothesis is peripheral &#8212; is an interesting and worthy hypothesis but should not be the final arbiter of your sun exposure habits.<br><br>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-february">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;Is It Important to Get Vitamin D Sulfate Specifically From the Sun? | Masterjohn Q&amp;A Files #318&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/5fKnNE8GIIMR1W7ns2cXq2&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/5fKnNE8GIIMR1W7ns2cXq2" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe>
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   ]]></content:encoded></item><item><title><![CDATA[317: If I have a hereditary weakness in breaking down branched-chain amino acids, what cofactors do I need to consider, and do I need to restrict my protein when losing weight?]]></title><description><![CDATA[Watch now (21 min) | Masterjohn Q&A Files Episode 317]]></description><link>https://chrismasterjohnphd.substack.com/p/317-if-i-have-a-hereditary-weakness</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/317-if-i-have-a-hereditary-weakness</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 19 Jun 2023 14:00:58 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/8854b1b5-53f9-4961-a3ba-3a7780b2bc6f_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>If a person has a hereditary weakness for Branched Chain Amino Acid Catabolism would this impact the type of diet they might choose to loose weight? Should they limit protein if it will increase their need for nutrients like Biotin?What are all the possible cofactors we should consider supplementing to support Leucine catabolism?</p><p><strong>Short Answer: </strong>Metabolizing branched-chain amino acids requires all B vitamins except folate, calcium, magnesium, potassium, and chloride. If you have a genetic impairment in this pathway, then reducing branched-chain amino acid intake and doubling down on cofactors is important during weight loss because the pathway will be stressed more in the catabolic state.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-january">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;If I have a hereditary weakness in breaking down branched-chain amino acids, what cofactors do I need to consider, and do I need to restrict my protein when losing weight? | Masterjohn Q&amp;A Files #317&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/6AE5eyg4ZUzjL7aZp9CyIO&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/6AE5eyg4ZUzjL7aZp9CyIO" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[316: How do I consume omega-3 without hurting my omega-6 status?]]></title><description><![CDATA[Watch now | Masterjohn Q&A Files Episode 316]]></description><link>https://chrismasterjohnphd.substack.com/p/316-how-do-i-consume-omega-3-without</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/316-how-do-i-consume-omega-3-without</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 05 Jun 2023 14:01:04 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/c6560189-9e75-4a3e-81e0-a0ea77d475f2_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>If I don&#8217;t want to hurt my omega 6 status through my omega 3 intake, how do I do that? Is it simply a question of taking them at separate times? Or is it a question of dose? And if it is a question of dose, how do I know when to start eating fish and taking my omega 3 supplement again?</p><p><strong>Short Answer: </strong>How they are combined in meals is not important, but it is important not to have too much EPA in cell membranes relative to arachidonic acid, and this is driven by cumulative intake over years. For someone who has consumed too much EPA for many years, the best approach is to eat liver and egg yolks for arachidonic acid while getting omega-3s from a DHA supplement and not from fish, fish oil, or fish liver oil.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-january">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;How do I consume omega-3 without hurting my omega-6 status? | Masterjohn Q&amp;A Files #316&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/6eL7I4EIab7ZkZjGzHIkG3&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/6eL7I4EIab7ZkZjGzHIkG3" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[315: Can plant foods and their phytochemicals be used to reduce arterial plaque?]]></title><description><![CDATA[Watch now (28 min) | Masterjohn Q&A Files Episode 315]]></description><link>https://chrismasterjohnphd.substack.com/p/315-can-plant-foods-and-their-phytochemicals</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/315-can-plant-foods-and-their-phytochemicals</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 22 May 2023 14:01:00 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/4adeb5e4-e406-450a-90bc-b9b30e49cb2d_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>Can plant foods and their phytochemicals be used to reduce arterial plaque?<br><br><strong>Short Answer: </strong>Yes, but if you don&#8217;t have specific intolerances to plant compounds the best thing to do is simply aim to meet your vitamin and mineral targets from a diet rich in fruits, vegetables, herbs, and spices, rather than trying to use specific plant compounds from specific studies in any specific amount.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-january">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;Can plant foods and their phytochemicals be used to reduce arterial plaque? | Masterjohn Q&amp;A Files #315&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/3OEF3gFErjRJnyBfjmEAvn&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/3OEF3gFErjRJnyBfjmEAvn" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[314: What to Do About Twitching]]></title><description><![CDATA[Masterjohn Q&A Files Episode 314]]></description><link>https://chrismasterjohnphd.substack.com/p/314-what-to-do-about-twitching</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/314-what-to-do-about-twitching</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 08 May 2023 14:01:03 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/1154e99a-74df-46c3-9209-ef83a866dfb1_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>What can be done about twitching?</p><p><strong>Short Answer:</strong> Most twitching will be driven by glutamate/GABA balance or acetylcholine regulation, and the most likely nutritional issues are any of the electrolytes or any factor that influences energy metabolism. The best way to address it is to consider the conditions that influence it and then trial and error your way through each potential nutritional issue in order of which ones make the most sense for your individual case first.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-december">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;What to Do About Twitching | Masterjohn Q&amp;A Files #314&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/14MOD1SK0PNob7eJT9U9AY&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/14MOD1SK0PNob7eJT9U9AY" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[313: Vitamin K2 and Undercarboxylated Osteocalcin]]></title><description><![CDATA[Watch now (18 min) | Masterjohn Q&A Files Episode 314]]></description><link>https://chrismasterjohnphd.substack.com/p/313-vitamin-k2-and-undercarboxylated</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/313-vitamin-k2-and-undercarboxylated</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 17 Apr 2023 14:00:55 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/8abc4323-611e-4f46-8fc6-a34b05695eb4_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>If undercarboxylated osteocalcin has health benefits, and vitamin K2 decreases it, what does that mean for K2 supplementation?</p><p><strong>Short Answer: </strong>Vitamin K2 helps secure osteocalcin in bone matrix, where it is decarboxylated and released as an endocrine hormone in response to certain stimuli. When released, it acts to optimize insulin secretion, insulin sensitivity, fuel use during exercise, and male testosterone.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-december">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;Vitamin K2 and Undercarboxylated Osteocalcin | Masterjohn Q&amp;A Files #314&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/418ZmMROu4pDW1MwnaKhtF&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/418ZmMROu4pDW1MwnaKhtF" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[312: Phosphatidylcholine and TMAO]]></title><description><![CDATA[Watch now (22 min) | Masterjohn Q&A Files Episode 312]]></description><link>https://chrismasterjohnphd.substack.com/p/312-phosphatidylcholine-and-tmao</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/312-phosphatidylcholine-and-tmao</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 03 Apr 2023 14:00:56 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/bf222f8c-9c37-4733-b137-593bb0473e58_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question:</strong> If I'm at risk of heart disease and phosphatidylcholine increases my TMAO, should I stop the supplement?</p><p><strong>Short Answer: </strong>On a scale of one to ten, my concern about TMAO and cardiovascular disease is a three. There are thousands of things that should be given equal weight as potential contributors to heart disease, but TMAO gets the most attention because the Cleveland Clinic has an incredible PR machine to spread their research, which serves to bolster their financial interest in marketing the test. That said, it is not a universal necessity to supplement with phosphatidylcholine. If you are concerned about your TMAO, you can try substituting trimethylglycine (TMG), and ultimately judge the value of each supplement by whether it is helping you in a demonstrable way.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-december">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;Phosphatidylcholine and TMAO | Masterjohn Q&amp;A Files #313&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/6EYcT7qjIAtdpg0eIBODIi&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/6EYcT7qjIAtdpg0eIBODIi" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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   ]]></content:encoded></item><item><title><![CDATA[311: Low Blood Sugar on Vegan Keto]]></title><description><![CDATA[Watch now | Masterjohn Q&A Files Episode 311]]></description><link>https://chrismasterjohnphd.substack.com/p/311-low-blood-sugar-on-vegan-keto</link><guid isPermaLink="false">https://chrismasterjohnphd.substack.com/p/311-low-blood-sugar-on-vegan-keto</guid><dc:creator><![CDATA[Chris Masterjohn, PhD]]></dc:creator><pubDate>Mon, 20 Mar 2023 14:00:30 GMT</pubDate><enclosure url="https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/fbad724e-1fc2-471e-805e-55b6c1a1e8cf_4200x3000.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p><strong>Question: </strong>How do I fix low blood sugar on vegan keto?</p><p><strong>Short Answer: </strong>Consider how important it is for your ketones to be elevated. Most likely you need to eat more protein, which will lower your ketones. I would aim for a minimum of 0.8 grams per kilogram of ideal bodyweight and consider using 1.2 grams per kilogram of ideal bodyweight. If this does not work, consider all of the nutrients involved in energy metabolism &#8212; all of the B vitamins, iron, copper, sulfur, magnesium, potassium &#8212; but especially biotin and B6 for their disproportionate role in gluconeogenesis. If the protein you need to normalize your blood sugar does reduce your ketones to a level that are not giving you the benefits you are looking for, you could consider raising them with exogenous ketones.</p><p>This episode was cut from the original Q&amp;A session that you can find <a href="https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-november">here</a>.</p><p><em>DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.</em></p><h1>Listen to the Audio</h1><p>I highly recommend watching the video above but you can also listen to the audio here:</p><iframe class="spotify-wrap podcast" data-attrs="{&quot;image&quot;:&quot;https://i.scdn.co/image/ab6765630000ba8ae5f9f43d31711ac7d3627773&quot;,&quot;title&quot;:&quot;Low Blood Sugar on Vegan Keto | Masterjohn Q&amp;A Files #311&quot;,&quot;subtitle&quot;:&quot;Chris Masterjohn, PhD&quot;,&quot;description&quot;:&quot;Episode&quot;,&quot;url&quot;:&quot;https://open.spotify.com/episode/6q0L2Du9QxetL7EoTlTMaC&quot;,&quot;belowTheFold&quot;:false,&quot;noScroll&quot;:false}" src="https://open.spotify.com/embed/episode/6q0L2Du9QxetL7EoTlTMaC" frameborder="0" gesture="media" allowfullscreen="true" allow="encrypted-media" data-component-name="Spotify2ToDOM"></iframe><h1><br>Read the Transcript or Leave a Comment</h1><p>Masterpass members have access to the transcript below.</p><p>Masterpass members can also read and leave comments below. Non-members can read and leave comments on the <a href="https://chrismasterjohnphd.substack.com/p/the-masterjohn-q-and-a-files">general podcast page</a>.</p><p>Learn more about the Masterpass <a href="https://chrismasterjohnphd.substack.com/about">here</a>.</p>
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