Q:

Is there such a thing as too much Vitamin D3?

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Quick Answer

Too much vitamin D is called "vitamin D toxicity," or hypervitaminosis D. This toxicity can be produced by excessive taking of vitamin D supplements including vitamin D3 supplements, according to Mayo Clinic.

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Full Answer

Normal food consumption and sun exposure can also provide the body with vitamin D, however, they are extremely unlikely to produce vitamin D toxicity, says Mayo Clinic. The two major forms of vitamin D supplements are D2 and D3, and these forms have similar health effects, according to the National Institutes of Health. However, vitamin D3 may be less likely than D2 to produce toxicity, according to Medscape.com; this is due to higher concentrations of D2 that don't bind well to the receptors tissues compared to vitamin D3.

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