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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.
That said, it’s usually recommended that adult women get between 310 to 400 milligrams of magnesium a day, while adult men should aim to have 400 to 420 milligrams a day.
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 recommended adequate intake of sodium is 1,500 milligrams (3.9 g salt) per day, and people over 50 need even less." [13] The Daily Value for potassium, 4,700 mg per day, was based on a study of men who were given 14.6 g of sodium chloride per day and treated with potassium supplements until the frequency of salt sensitivity was reduced to 20%.
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]
Cholecalciferol is a form of vitamin D which is naturally synthesized in skin and functions as a pro-hormone, being converted to calcitriol. This is important for maintaining calcium levels and promoting bone health and development. [4] As a medication, cholecalciferol may be taken as a dietary supplement to prevent or to treat vitamin D ...
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 ...
A third important effect of PTH on the kidneys is stimulation of the conversion of 25-hydroxy vitamin D into 1,25-dihydroxy vitamin D (calcitriol). [221] This form of vitamin D is the active hormone which promotes calcium uptake from the intestine via the action of calbindin. [223] Calcitriol also reduces calcium loss to urine. [220]
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