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Supplements31 mentions

Supplement vitamin D3 and adjust the dose to reach a blood level around 40–60 ng/mL, rather than taking a fixed one-size-fits-all amount. A common rule of thumb is that 1,000 IU raises serum vitamin D by about 5 ng/mL, so someone starting near 20 ng/mL may need roughly 4,000 IU daily to get into range. The goal is to correct low levels while avoiding underdosing, especially for people who get plenty of sun but still test low.

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“So even with vitamin d you know most people probably are deficient so they benefit from it but there's no point in really doing it unless you're deficient for most things”

Andrew Huberman · Best Tools for Gut Health & Weight Loss | Dr. Chris Thompson · Sep 21, 2026 · 2:04:11 · YouTube ↗
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