vitamin D2

American  

noun

1. calciferol.

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vitamin D2 British  

noun

1. another name for calciferol

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vitamin D2 Scientific  

1. A white crystalline sterol produced by ultraviolet irradiation of ergosterol and also occurring naturally in fungi and some fish oils. Vitamin D ₂ is the form of vitamin D generally used as a dietary supplement. Also called calciferol, ergocalciferol. Chemical formula: C ₂₈ H ₄₄ O.

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Example Sentences

Further research into the different functionalities of vitamin D2 and D3 should be a priority in deciding whether vitamin D3 should be the first-line choice of vitamin D supplement, subject to individual requirements.

From Science Daily • May 23, 2026

The study, published in Nutrition Reviews, analyzed data from randomized controlled trials and found that vitamin D2 supplementation resulted in a reduction in vitamin D3 levels compared to those not taking a vitamin D2 supplement.

From Science Daily • May 23, 2026

Taking vitamin D2 might lower the body's levels of the more efficient form of vitamin D, vitamin D3, according to new research from the University of Surrey, John Innes Centre and Quadram Institute Bioscience.

From Science Daily • May 23, 2026

I am confused about the difference between vitamin D2 and vitamin D3.

From Seattle Times • Apr. 10, 2024

You can get a version made from lichen, or choose vitamin D2.

From The Guardian • Nov. 24, 2018