Vitamin D3 May Be Better than Vitamin D2 During Winter Months

Results from a placebo controlled trial have shown that at the end of the study period, giving volunteers the D3 form of Vitamin D did not affect the overall concentrations of this form of the vitamin in their body, whereas volunteers given the D2 supplement had decreased levels of D3. Whilst many scientists agree that a lot of humans are vitamin D deficient, they have yet to identify the recommended daily dose.