Andrew Huberman· PhD
as you get old, you become very inefficient at converting vitamin D, making vitamin D3 in your skin.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
as you get old, you become very inefficient at converting vitamin D, making vitamin D3 in your skin.
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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you're either going to correct it with sun exposure, being in the right area, having the right amount of sun, and being the right age, um because as you get old, you become very inefficient at making vitamin D3 in your skin.