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The worthlessness of vitamin D is mildly exaggerated — LessWrong

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For a while there, many people thought vitamin D was magical—that it could improve bones, the heart, infections, cancer, heart disease, longevity, ev…

x The worthlessness of vitamin D is mildly exaggerated — LessWrong Nutrition World Modeling Frontpage 2026 Top Fifty: 12 % 112 The worthlessness of vitamin D is mildly exaggerated by dynomight 23rd Jun 2026 Linkpost for dynomight.net 24 min read 13 112 For a while there, many people thought vitamin D was magical—that it could improve bones, the heart, infections, cancer, heart disease, longevity, even mental health. But among people I respect, opinion is now overwhelmingly that taking vitamin D does nothing unless you're severely deficient. The central argument is that while vitamin D levels a

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