vitamin

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According to the National Academy of Science, 10\% to 30\% of older people can develop atrophic gastritis, but they can absorb vitamin B12 from vitamin pills, since in this form, the vitamin is already bioavailable.

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Definitions (3)

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  1. noun Any of various fat-soluble or water-soluble organic substances essential in minute amounts for normal growth and activity of the body and obtained naturally from plant and animal foods.

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Etymologies (1)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Alteration of vitamine : Latin vīta, life; see gwei- in Indo-European roots + amine (so called because they were originally thought to be amines).
 

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