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English definition of “niacin”

niacin

noun [U]     /ˈnaɪə.sɪn/ specialized
one of the vitamin B complex found in foods such as wheat, beef, chicken, and milk, important for producing energy from food and for keeping the digestion and nervous system healthyVitamins and minerals
(Definition of niacin noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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