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2. Calcifediol - Wikipedia

   en.wikipedia.org/wiki/Calcifediol

   The name 25(OH)D refers to any combination of calcifediol (25-hydroxy-cholecalciferol), derived from vitamin D 3, and ercalcidiol (25-hydroxy-ergocalciferol), [1] derived from vitamin D 2. The first of these (also known as 25-hydroxy vitamin D3) is made by the body, or is sourced from certain animal foods or cholecalciferol supplements.

3. 25-Hydroxyvitamin D 1-alpha-hydroxylase - Wikipedia

   en.wikipedia.org/wiki/25-Hydroxyvitamin_D_1...

   25-Hydroxyvitamin D 1-alpha-hydroxylase (VD 1A hydroxylase) also known as calcidiol 1-monooxygenase [5] or cytochrome p450 27B1 (CYP27B1) or simply 1-alpha-hydroxylase is a cytochrome P450 enzyme that in humans is encoded by the CYP27B1 gene. [6] [7] [8]

4. Vitamin D - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D

   [40] [61] [62] Ultraviolet light alone - sunlight or tanning beds - can raise serum 25(OH)D concentration to a bit higher than 100 nmol/L, but not to a level that causes hypervitaminosis D, the reasons being that there is a limiting amount of the precursor 7-dehydrocholesterol synthesized in the skin and a negative feedback in the kidney ...

5. Vitamin D toxicity - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D_toxicity

   The normal range for blood concentration of 25-hydroxyvitamin D in adults is 20 to 50 nanograms per milliliter (ng/mL). Blood levels necessary to cause adverse effects in adults are thought to be greater than about 150 ng/mL, leading the Endocrine Society to suggest an upper limit for safety of 100 ng/mL. [1]

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

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

   Vitamin D is essential for bone health and immune function, and deficiency is common. Consoider one of these vitamin D supplements if you're not getting enough.

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

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

   Research has shown that vitamin D3 tends to be more effective than vitamin D2 supplementation when trying to increase serum vitamin D levels, says Pelitera. “In bloodwork, we measure Vitamin D ...