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Learn how vitamin D affects bone health and other health conditions, and discover the possible side effects of taking too much of this supplement.
Vitamin D toxicity, also called hypervitaminosis D, is a rare but potentially serious condition that occurs when you have excessive amounts of vitamin D in your body. Vitamin D toxicity is usually caused by large doses of vitamin D supplements — not by diet or sun exposure.
Clinicians may recommend supplementation but be unsure how to choose the optimal dose and type of vitamin D and how to use testing to monitor therapy. This review outlines strategies to prevent, diagnose, and treat vitamin D deficiency in adults.
Vitamin D deficiency — when the level of vitamin D in your body is too low — can cause your bones to become thin, brittle or misshapen. Vitamin D also appears to play a role in insulin production and immune function — and how this relates to chronic disease prevention and cancer — but this is still being investigated.
Vitamin D is vital to bone health, immune support, and the parathyroid glands. Learn about where it comes from, its side effects, and more.
Too much calcium in the blood can cause weakness, lead to kidney stones, and interfere with the heart and brain, and even be life threatening. The Mayo researchers also found that women over age 65 were at the highest risk of having vitamin D levels above 50 ng/mL.
If left untreated over time, vitamin D deficiency can lead to serious bone disorders. For example, severe and long-term vitamin D deficiency may result in rickets or osteomalacia.
Mayo Clinic recommends that adults get at least the RDA of 600 IU. However, 1,000 to 2,000 IU per day of vitamin D from a supplement is generally safe, should help people achieve an adequate blood level of vitamin D, and may have additional health benefits.
Vitamin D deficiency means that you don’t have enough vitamin D in your body. It's common and primarily causes issues with your bones and muscles.
According to Mayo Clinic, taken in appropriate doses, vitamin D is generally considered safe. However, taking too much vitamin D in the form of supplements can be harmful. Children age 9 years and older, adults, and pregnant and breastfeeding women who take more than 4,000 IU a day of vitamin D might experience: