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2. 7-Dehydrocholesterol - Wikipedia

   en.wikipedia.org/wiki/7-Dehydrocholesterol

   7-DHC can be produced by animals and plants via different pathways. It is not produced by fungi in significant amounts. It is made by some algae, but the pathway is poorly understood. [11] Industrially, 7-DHC generally comes from lanolin, and is used to produce vitamin D3 by UV exposure. [12] Lichen (Cladonia rangiferina) is used to produce ...

3. Cholecalciferol - Wikipedia

   en.wikipedia.org/wiki/Cholecalciferol

   Low levels of vitamin D3 are more commonly found in individuals living in northern latitudes or with other reasons for a lack of regular sun exposure, including being housebound, frail, elderly, or obese, having darker skin, and wearing clothes that cover most of the skin. [23] [24] Supplements are recommended for these groups of people. [24]

4. 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. [198] Vitamin D 2 (ergocalciferol) is produced in a similar way using ergosterol from yeast as a ...

5. 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 ...

6. 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.

7. 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 ...