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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.

Despite decades of research, vitamin B12 deficiency remains common, particularly among older adults, vegans, vegetarians and people with conditions that affect absorption.

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

Others develop autoimmune gastritis, in which the immune system damages stomach cells involved in producing acid and intrinsic factor, the protein needed for vitamin B12 absorption.

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

“We can eat almost anything, actually, but we need the squash because we need lots of vitamin A. What’s more, it’s really, really yummy.”

From "Invisible Inkling" by Emily Jenkins




Vocabulary lists containing vitamin


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