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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. [1]
Most people take vitamins expecting some sort of health boost. ... Vitamin D is known as the sunshine vitamin because the body can make it in a process that involves the sun hitting uncovered skin ...
The researchers discovered that people who took vitamin D had a 40% lower risk of developing dementia than those who didn’t take a supplement. They also had a 15% higher five-year survival rate.
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 ...
Unlike the other twelve vitamins, vitamin D is only conditionally essential - in a preindustrial society people had adequate exposure to sunlight and the vitamin was a hormone, as the primary natural source of vitamin D was the synthesis of cholecalciferol in the lower layers of the skin’s epidermis, triggered by a photochemical reaction with ...
How To Get More Vitamin D. Most people can get vitamin D from food sources like cod liver oil, trout, salmon, and mushrooms, says Keri Gans, RD, author of The Small Change Diet. But if you have a ...