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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 ...
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 ...
Vitamin D (the inactive version) is mainly from two forms: vitamin D 3 and vitamin D 2. Vitamin D 3, or cholecalciferol, is formed in the skin after exposure to sunlight or ultra violet radiation or from D 3 supplements or fortified food sources. Vitamin D 2, or ergocalciferol, is obtained from D 2 supplements or fortified food sources. [3]
“There’s good evidence that the higher your blood level of vitamin D, the lower your risk of getting infected with COVID-19,” says Dr. Michael Holick, MD, a leading vitamin D expert and a ...
Kelly grew up in Newton, Massachusetts [2] and attended Newton North High School where she helped lead the science bowl team to national competition. [3] Kelly graduated from Princeton University in 2002 and completed a Ph.D. at the University of California, Berkeley, studying the history of archaeology in 19th century Mexico.
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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 ...
Adequate intake of calcium and vitamin D is essential for bone health. The National Osteoporosis Foundation recommends a daily calcium intake of 1,000 mg for men aged 50-70 and 1,200 mg for women aged 51 and older and men aged 71 and older. For vitamin D, a daily intake of 800-1,000 IU is recommended for adults aged 50 and older. [30]
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