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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]
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 ...
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 ...
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.
Vitamin D is an important nutrient that's top of mind for many lately, and that's good news since most people in the United States don't consume enough of it, according to the National Institutes ...
Presently, consumption of extensively large amounts of calcium carbonate has replaced the over-ingestion of milk products, or milk and bicarbonate, as the most prominent cause of MAS. Excessive consumption of calcium generally means taking in more than 4 to 5 g of calcium carbonate every day. [3]
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 ...