What is the difference between vitamins D2 and D3?

Updated: Dec 15, 2020
  • Author: Vin Tangpricha, MD, PhD; Chief Editor: Romesh Khardori, MD, PhD, FACP  more...
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Past studies suggested that vitamin D3 may be more effective than vitamin D2 in establishing normal vitamin D stores. [9, 10] However, a study by Holick and colleagues demonstrated that vitamin D2 and vitamin D3 appear to be equipotent in raising 25(OH)D concentrations when they are given in daily doses of 1000 IU. [11]

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