vitamin D3

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.

vitamin D3

noun

1. another name for cholecalciferol

vitamin D3

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.

Example Sentences

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

From Seattle Times

Vitamin D3, on the other hand, comes from animal sources like wool.

From Seattle Times

"Based on our findings, we would recommend that all pregnant women consider a daily intake of at least 4400 IU vitamin D3 throughout their pregnancy, starting at the time of conception."

From Science Daily

My oncologist is a big believer in vitamin D3 supplements.

From Seattle Times

The vitamin D and Type 2 Diabetes randomized controlled trial found that after 2.5 years, taking 4,000 IU of vitamin D3 daily was no better than a placebo at preventing diabetes in high-risk adults.

From Seattle Times