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2. Vitamin D - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D

   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, [11] 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. [12]

3. How to Get Enough Vitamin D in The Winter, According to ... - AOL

   www.aol.com/enough-vitamin-d-winter-according...

   The following are her recommended daily amounts of 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) ...

4. Dietary Reference Value - Wikipedia

   en.wikipedia.org/wiki/Dietary_Reference_Value

   In recent times, [when?] Dietary Reference Values are under the interest of the European Food Safety Authority too, which intend to extend them at the EU level. EFSA is the equivalent of the Food and Drug Administration (FDA) in the USA, and acts as watchdog inside the European market in order to establish a common ground on food safety requirements and nutrition as well.

5. Dietary Reference Intake - Wikipedia

   en.wikipedia.org/wiki/Dietary_Reference_Intake

   Estimated Average Requirements (EAR), are expected to satisfy the needs of 50% of the people in that age group based on a review of the scientific literature. Recommended Dietary Allowances (RDA), the daily dietary intake level of a nutrient considered sufficient by the Food and Nutrition Board of the Institute of Medicine to meet the ...

6. Taking This Daily Vitamin Could Slash Dementia Risk By 40 ...

   www.aol.com/taking-daily-vitamin-could-slash...

   The recommended daily allowance of vitamin D varies by person. However, most adults should get 600 international units (IU) daily, while adults 70 and up should have 800 IU of the nutrient, ...

7. 6 Foods with More Vitamin D Than an Egg, According to a ... - AOL

   www.aol.com/6-foods-more-vitamin-d-194319425.html

   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 ...