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2. Vitamin D - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D

   Vitamin D 5. sitocalciferol. (made from 7-dehydrositosterol) Several forms (vitamers) of vitamin D exist, with the two major forms being vitamin D 2 or ergocalciferol, and vitamin D 3 or cholecalciferol. [ 1 ] The term 'vitamin D' refers to either D 2 or D 3, or both, and is known collectively as calciferol.

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

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

   Therefore, foods high in vitamin D will be the best ways to prevent a deficiency, says Prest. Some of the best food sources of vitamin D, according to Prest, include: Salmon. Mackerel. Sardines ...

4. 6 Surprising Benefits of Vitamin D, According to Nutritionists

   www.aol.com/6-vitamin-d-health-benefits...

   Reference: National Institutes of Health, Office of Dietary Supplements. Most people need about 600 IU per day, but people over the age of 70 need a little more, somewhere around 800 IU to reduce ...

5. Cholecalciferol - Wikipedia

   en.wikipedia.org/wiki/Cholecalciferol

   The Institute of Medicine in 2010 recommended a maximum uptake of vitamin D of 4000 IU/d, finding that the dose for lowest observed adverse effect level is 40,000 IU daily for at least 12 weeks, [25] and that there was a single case of toxicity above 10 000 IU after more than seven years of daily intake; this case of toxicity occurred in ...

6. Vitamin D deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D_deficiency

   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. [1][7][2] One nanogram per millilitre (1 ng/mL) is equivalent to 2.5 nanomoles per litre (2.5 nmol/L). Severe deficiency: <12 ng/mL = <30 nmol/L[2] Deficiency ...

7. Study casts more doubt on use of high-dose vitamin D pills - AOL

   www.aol.com/news/study-casts-more-doubt-high...

   The latest results compare bone fractures in those who took either a high dose — 2,000 international units of the most active form of vitamin D, called D-3 — or dummy pills every day for five ...