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Definition of Niacin

Niacin: Nicotinic acid, one of the B-complex vitamins-B 3. Deficiency of niacin in the diet results in the disease pellagra. See: Pellagra.

QUESTION

According to the USDA, there is no difference between a “portion” and a “serving.” See Answer
References
Medically reviewed by Martin Zipser, MD; Board Certified: Surgery

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