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  2. Vitamin D - Wikipedia

    en.wikipedia.org/wiki/Vitamin_D

    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 ...

  3. How to get the most out of vitamin D3 - AOL

    www.aol.com/news/most-vitamin-d3-020914344.html

    Vitamin D3, aka cholecalciferol, is important for bone health and immune function. Experts discuss benefits, sources, risks and who needs a supplement.

  4. Experts Say This Is Real Difference Between Vitamin D and D3

    www.aol.com/experts-real-difference-between...

    Vitamin D3 needs for the average adult between the ages 19 and 70 years old is 600 IU (15 mcg) per day, says Pelitera. “This includes foods, for example, 1 cup of fortified milk contains about ...

  5. These Supplements Are 'Must-Haves' For Energy If You're Over ...

    www.aol.com/lifestyle/dietitians-supplements...

    “This supplement includes key vitamins and minerals such as B12, D3, and magnesium, tailored to support the specific health needs of women over 50 without any unnecessary additives or allergens ...

  6. Vitamin D deficiency - Wikipedia

    en.wikipedia.org/wiki/Vitamin_D_deficiency

    Mapping of several bone diseases onto levels of vitamin D (calcidiol) in the blood [6] Normal bone vs. osteoporosis. 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.

  7. Multivitamin - Wikipedia

    en.wikipedia.org/wiki/Multivitamin

    Some women may need to take iron, vitamin C, or calcium supplements during pregnancy, but only on the advice of a doctor. In the 1999–2000 National Health and Nutrition Examination Survey , 52% of adults in the United States reported taking at least one dietary supplement in the last month and 35% reported regular use of multivitamin ...