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Vitamin D toxicity, or hypervitaminosis D, is the toxic state of an excess of vitamin D. The normal range for blood concentration of 25-hydroxyvitamin D in adults is 20 to 50 nanograms per milliliter (ng/mL).
Specific medical names of the different conditions are derived from the given vitamin involved: an excess of vitamin A, for example, is called hypervitaminosis A. Hypervitaminoses are primarily caused by fat-soluble vitamins ( D and A ), as these are stored by the body for longer than the water-soluble vitamins.
People who take vitamin D supplements before being admitted for intensive care are less likely to die than those who do not take vitamin D supplements. [49] Additionally, vitamin D levels decline during stays in intensive care. [50] Vitamin D 3 (cholecalciferol) or calcitriol given orally may reduce the mortality rate without significant ...
Vitamin A deficiency is rare in the United States, where most people get enough from food sources. Adults shouldn’t have more than 3,000 mcg per day; if excessive vitamin A builds up in the ...
Vitamin D supplementation for postmenopausal women and older men — given that those populations had normal vitamin D levels, no previous fractures, and no issues with bone density — was found ...
In women, vitamin D receptors are expressed in the superficial layers of the urogenital organs. There is an association between vitamin D deficiency and a decline in sexual functions, including sexual desire, orgasm, and satisfaction in women, with symptom severity correlated with vitamin D serum concentration.
These two forms of vitamin D are metabolized in the liver and stored as 25-hydroxyvitamin D. [4] Before biological use, the storage form must be converted into an active form. One common active form is 1,25-dihydroxyvitamin D. [4] The term vitamin D in this article means cholecalciferol, ergocalciferol, 25-hydroxyvitamin D, and the active forms ...
A U.K. coroner is pushing the country’s Food Standards Agency to upgrade its labeling of certain dietary supplements, after a man died in part from vitamin D toxicity, or hypervitaminosis D.