Too much vitamin D may harm bones, not help

Expires on 07/14/2022

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There's no question that vitamin D can help build strong bones. But there may be a sweet spot when it comes to how much.

A study published in the Aug. 27 issue of JAMA found that, compared with people who took moderate amounts of vitamin D, adults who took large amounts daily not only didn't see additional gains in bone density, but in some cases ended up worse off.

"People often assume that if some is good, more is better," says Dr. JoAnn E. Manson, the Michael and Lee Bell Professor of Women's Health at Harvard Medical School. "This is generally not the case, and certainly is not true of vitamin D. While there is no question that vitamin D and calcium are essential to bone health, it appears that very high doses of vitamin D don't provide further benefits for bone health and may actually have a harmful effect."

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Nutrition

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Journal Topics Nutrition, Wellness
Journal Types Information
Medical Diseases Deficiency, Osteoporosis, Women's Health
Medical Professionals Nutrition Care Professionals (NCP)
Source Verified: Health News Organizations Health.Harvard

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