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141: What’s the safe use of an iodine nasal spray?

Masterjohn Q&A Files Episode 141


Question: What’s the safe use of an iodine nasal spray?

So, the iodine in the food and supplement guide for the coronavirus most recent version, I included iodine as a nasal spray. It's very important to look at the percentages. And so, 0.5% is the concentration recommended and that means that if you get a 10% solution, which is the most common one, you want to dilute it down 20-fold, which means taking one part of the 10% solution 19 parts water. If you have a different percentage starting solution, you wanna dilute it differently. And it's critically important that you dilute it properly. And so, you should have someone double check your work if you're doing your own math or triple check your work because higher concentrations can cause damage to the nasal tissue. But in terms of how often what I recommend doing is using it as a before and after in potential exposures.

For additional important safety information please see here:

This Q&A can also be found as part of a much longer episode, here:

Harnessing the Power of Nutrients
Recording and Transcript of Ask Me Anything About Nutrition | July 27, 2020
Watch now (129 min) | Below you will find the time stamps for specific questions, the relevant links, the private podcast audio version, and the transcript. The time stamps are available to everyone but everything else is reserved for Masterpass members. Learn more about the Masterpass…
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For the remainder of 2020, I will be working full-time on finishing my Vitamins and Minerals 101 book, while reserving a portion of my time for consulting clients. You can pre-order my book at You can sign up for a consultation at

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.

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The Masterjohn Q&A Files
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.
Chris Masterjohn, PhD