vitamin D3

American  

noun

1. a D vitamin, C 27 H 43 OH, occurring in fish-liver oils, that differs from vitamin D 2 by slight structural differences in the molecule.

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vitamin D3 British  

noun

1. another name for cholecalciferol

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vitamin D3 Scientific  

1. A colorless, crystalline steroid hormone that the body synthesizes in the skin when its precursor, a derivative of cholesterol, is irradiated by sunlight. Vitamin D ₃ is also found in fish-liver oils, irradiated milk, and all irradiated animal foodstuffs. Also called calciferol, cholecalciferol. Chemical formula: C ₂₇ H ₄₄ O.

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Example Sentences

See Examples For:

vitamin D3

That goal has become increasingly practical because plant-based and animal-free sources of vitamin D3 are now available, including D3 derived from lichen.

From Science Daily ● Oct. 8, 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

“This meta-analysis highlights the importance of ensuring plant-based vitamin D3 is accessible in the UK.”

From Science Daily ● May 23, 2026

A colleague in Manchester had asked him if they had seen any of a "bad batch" of vitamin D3.

From BBC ● Apr. 16, 2026

Roo was prescribed a high dose of vitamin D3 drops for 12 weeks in December 2024 to try to ease intense pain in his legs.

From BBC ● Apr. 16, 2026

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