055: What should people with glucose-6-phosphate dehydrogenase deficiency be doing not just about glutathione, but about folate, vitamin K, fatty acids, and neurotransmitters?

Masterjohn Q&A Files Episode 55

Introduction

G6PD, glucose-6-phosphate dehydrogenase deficiency, is an inborn error of metabolism. It's the most common one in the world. About 8% globally have some impairment in this enzyme. The reason that it's important is because glucose-6-phosphate dehydrogenase is the enzyme that allows you to make NADPH, which is a specific derivative of niacin that's involved in antioxidant defense, detoxification, synthesis of neurotransmitters, and synthesis of nucleotides, which are needed for cell division because they're parts of DNA.

Someone with G6PD deficiency is vulnerable to hemolysis, or the destruction of red blood cells, because of glutathione deficiency. Glutathione reductase uses energy and NADPH, the thing that you can't make, to recycle glutathione. But it also uses riboflavin. So, one of the adaptations that someone with this impairment has to try to protect themselves is for the glutathione reductase enzyme to hog all the riboflavin so that it says, "I don't have enough of the raw material I need to make this happen, so I'm just going to make myself get way better at using what I do have." That's an adaptation to compensate for not being able to make NADPH is just to get way better at using NADPH to recycle glutathione.

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