Benefits of Vitamin D Supplementation

Vitamin D2

Also known as ergocalciferol, this form is manufactured by UV irradiation of ergosterol from yeast (Figure 2).

Holick wrote: “Since vitamin D is approximately 30% as effective as vitamin D in maintaining serum 25-hydroxyvitamin D levels, up to three times as much vitamin D may be required to maintain sufficient levels.”

In 1940, E.A. Park observed confusing results from studies on D and D.


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