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2. Looking For A Vitamin D Supp? Choose One With D3, Not D2 - AOL

   www.aol.com/looking-vitamin-d-supp-choose...

   “Vitamin D3 cholecalciferol is the most absorbable and potent form, [whereas] Vitamin D2 (ergocalciferol) is typically plant-based and not as effective at raising vitamin D levels in the body ...

3. 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 ...

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

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

   Vitamin D2 vs. D3 Uses. Both vitamin D2 and vitamin D3 will help to increase vitamin D levels in the blood, says Pelitera. However, some studies have shown that supplementing vitamin D3 does a ...

5. Previtamin D3 - Wikipedia

   en.wikipedia.org/wiki/Previtamin_D3

   Previtamin D 3 is an intermediate in the production of cholecalciferol (vitamin D 3). It is formed by the action of UV light, most specifically UVB light of wavelengths between 295 and 300 nm, acting on 7-dehydrocholesterol in the epidermal layers of the skin. [1] [2] [3] The B ring of the steroid nucleus structure is broken open, making a ...

6. Cholecalciferol - Wikipedia

   en.wikipedia.org/wiki/Cholecalciferol

   Cholecalciferol, also known as vitamin D 3 or colecalciferol, is a type of vitamin D that is produced by the skin when exposed to UVB light; it is found in certain foods and can be taken as a dietary supplement. [3] Cholecalciferol is synthesised in the skin following sunlight exposure. [4]

7. 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 ...