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We Asked a Dietitian Why Vitamin D Supplements Can Make You Feel Worse

Supplements and Nutrition

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Dr. Sanders

(@Dr. Sanders)

Joined: 3 weeks ago

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Topic starter 14/02/2026 11:42 pm

Millions of Americans are deficient in vitamin D, and many have turned to supplements as a result.1
Cui A, Xiao P, Ma Y, et al. Prevalence, trend, and predictor analyses of vitamin D deficiency in the US population, 2001–2018. Front Nutr. 2022;9:965376. doi:10.3389/fnut.2022.965376

But some people say they felt sick from taking vitamin D supplements. To understand why this happens, we spoke to Morgan L. Walker, MS, RD, a registered dietitian at Lebanon Valley College.

https://www.verywellhealth.com/why-vitamin-d-supplements-make-you-feel-worse-11888689

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vitamin d side effects feeling worse supplement hypercalcemia symptoms magnesium deficiency lin vitamin d intolerance

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