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How much vitamin D do you need per day? The recommended daily intake of vitamin D for healthy people varies by age, per the NIH. Children (1–18 years): 15 mcg or 600 IU.
The recommended dietary allowance of vitamin D is 600 IU a day for those between ages 1 and 70, and 800 IU for those over 70. (For reference: a three-ounce serving of trout has 645 IU and one cup ...
For individuals 1 through 70: 15 mcg of vitamin D per day (600 IU) For individuals 71 and older: 20 mcg of vitamin D per day (800 IU) Manetti notes that IU is "Often the unit used on supplements."
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. The role of vitamin D is best characterized as enabling calcium absorption and regulating calcium homeostasis. Vitamin D also play a role in phosphate absorption. [5]
Ergocalciferol may be used as a vitamin D supplement, whereas cholecalciferol (vitamin D 3) is produced naturally by the skin when exposed to ultraviolet light. [15] Ergocalciferol (D 2 ) and cholecalciferol (D 3 ) are considered to be equivalent for vitamin D production, as both forms appear to have similar efficacy in ameliorating rickets ...
Vitamin D deficiency is typically diagnosed by measuring the concentration of the 25-hydroxyvitamin D in the blood, which is the most accurate measure of stores of vitamin D in the body. [1] [7] [2] One nanogram per millilitre (1 ng/mL) is equivalent to 2.5 nanomoles per litre (2.5 nmol/L). Severe deficiency: < 12 ng/mL = < 30 nmol/L [2]
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