Chris Kresser 2/10/2026

RHR: Vitamin D: Why a Personalized Approach Is Best

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This article, based on a podcast episode, details why standard vitamin D guidelines are insufficient. It covers the impact of obesity, aging, and organ health on vitamin D status, the risks of deficiency and excess, the importance of testing, and the role of cofactors like magnesium and vitamin K. It provides practical advice for personalizing supplementation and sun exposure, citing numerous scientific studies.

RHR: Vitamin D: Why a Personalized Approach Is Best

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