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2. Wait, Should You Be Taking Vitamin D2 or D3? - AOL

   www.aol.com/wait-taking-vitamin-d2-d3-150000295.html

   But “vitamin D3 is more bioavailable (a.k.a has a stronger ability to be absorbed and used in the body), which is why people tend to prefer vitamin D3," says JoAnn Manson, M.D., MPH, DrPH, a ...

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

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

   The two most common forms are vitamin D2 and vitamin D3. Vitamin D is a fat-soluble vitamin which plays a major role in bone health, immunity, and nerve communication between the brain and muscle ...

4. Cholecalciferol - Wikipedia

   en.wikipedia.org/wiki/Cholecalciferol

   Some unwanted isomers are formed during irradiation: these are removed by various techniques, leaving a resin which melts at about room temperature and usually has a potency of 25 000 000 to 30 000 000 International Units/gram. Cholecalciferol is also produced industrially for use in vitamin supplements from lichens, which is suitable for ...

5. Vitamin D - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D

   Vitamin D 3 (cholecalciferol) is produced industrially by exposing 7-dehydrocholesterol to UVB and UVC light, followed by purification. The 7-dehydrocholesterol is sourced as an extraction from lanolin, a waxy skin secretion in sheep's wool. [189] Vitamin D 2 (ergocalciferol) is produced in a similar way using ergosterol from yeast as a ...

6. Vitamin D and neurology - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D_and_neurology

   Vitamin D 2, or ergocalciferol, is obtained from D 2 supplements or fortified food sources. [3] These two forms of vitamin D are metabolized in the liver and stored as 25-hydroxyvitamin D. [ 4 ] Before biological use, the storage form must be converted into an active form.

7. Calcium/cholecalciferol - Wikipedia

   en.wikipedia.org/wiki/Calcium/Cholecalciferol

   It is used to prevent and treat lack of calcium and vitamin D in the elderly, as well for osteoporosis in combination with other medications. [ 1 ] [ 2 ] In 2022, the combination, calcium/vitamin D was the 246th most commonly prescribed medication in the United States, with more than 1 million prescriptions.