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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. Adults (18–70 years): 15 mcg or 600 IU.
A 3½-ounce serving of sockeye salmon contains an average of 670 international units (IU) of vitamin D, more than the recommended daily value for a person under age 70, according to the U.S ...
Both vitamin D2 and D3 are good, but “D3 has better bioavailablilty,” says Dr. Manson, meaning that it’s more easily used by your body. But that doesn’t mean any old brand will do.
Vitamin D 3 was shown to result from the ultraviolet irradiation of 7-dehydrocholesterol. Although a chemical nomenclature for vitamin D forms was recommended in 1981, [12] alternative names remain commonly used. [3] Chemically, the various forms of vitamin D are secosteroids, meaning that one of the bonds in the steroid rings is broken. [13]
In that study, the compliance calculation could be questionable since only random samples of the returned medications were counted. In a study by De Niet et al., [72] 60 subjects with vitamin D deficiency were randomized to receive 2000 IU vitamin D3 daily or 50 000 IU monthly. They reported a similar efficacy of the two dosing frequencies ...
Trout is an excellent source of vitamin D, with a 3-ounce serving providing 645 IU—more than 100% of the daily recommended intake for most adults. This makes it one of the richest natural ...
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