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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).
In the United States, overdose exposure to all formulations of "vitamins" (which includes multi-vitamin/mineral products) was reported by 62,562 individuals in 2004 with nearly 80% of these exposures in children under the age of 6, leading to 53 "major" life-threatening outcomes and 3 deaths (2 from vitamins D and E; 1 from a multivitamin with ...
Because vitamin D helps regulate calcium levels in your body, hypercalcemia is a direct result of vitamin D toxicity, says Jamie Alan, Pharm.D., an associate professor in the Department of ...
[2] [3] It is generally accepted that doses of any vitamin greatly in excess of nutritional requirements will result either in toxicity (vitamins A and D) or in the excess simply being metabolised; thus evidence in favour of vitamin supplementation supports only doses in the normal range.
Taking too much vitamin D can be toxic in rare cases, as with an 89-year-old U.K. man who died in March in part from vitamin D toxicity (though he did have several underlying conditions).
The Mayo Clinic's website says when there is a reaction: "The main consequence of vitamin D toxicity is a buildup of calcium in blood (hypercalcemia), which can cause poor appetite, nausea and ...
This condition can be caused by vitamin D, calcium or phosphorus deficiency. [84] Vitamin D deficiency remains the main cause of rickets among young infants in most countries because breast milk is low in vitamin D, and darker skin, social customs, and climatic conditions can contribute to inadequate sun exposure.
Vitamin D3, aka cholecalciferol, is important for bone health and immune function. Experts discuss benefits, sources, risks and who needs a supplement. How to get the most out of vitamin D3