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Definitions

vitamin

[vahy-tuh-min, vit-uh-min] / ˈvaɪ tə mɪn, ˈvɪt ə mɪn /
NOUN
nutrient
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In humans, vitamin B12 is directly needed by only two enzymes, the proteins that help chemical reactions happen in the body.

From Science Daily • Jun. 25, 2026

B12 injections are an established treatment for diagnosed deficiency, particularly when absorption is impaired, and the NHS uses hydroxocobalamin injections for vitamin B12 deficiency anemia.

From Science Daily • Jun. 25, 2026

Pernicious anemia is different: the problem is not bleeding, but poor absorption of vitamin B12.

From Science Daily • Jun. 25, 2026

The story of vitamin B12 is unusual because the body needs so little of it, yet the consequences of deficiency can be profound.

From Science Daily • Jun. 25, 2026

“You can’t stay holed up in this apartment. What about friends? What about fresh air? She probably has a vitamin D deficiency.”

From "The Miscalculations of Lightning Girl" by Stacy McAnulty




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