ni·​a·​cin | \ ˈnī-ə-sən How to pronounce niacin (audio) \

Definition of niacin

: an acid C6H5NO2 of the vitamin B complex found widely in animals and plants and used especially against pellagra also : nicotinamide

called also nicotinic acid

Examples of niacin in a Sentence

Recent Examples on the Web Coffee also contains trace amounts of vitamins and minerals like calcium, iron, potassium, magnesium, and niacin. Marygrace Taylor, SELF, 31 May 2022 Some brands, like Impossible and Beyond, also add a bunch of vitamins and minerals—zinc, niacin, and B vitamins, for example—to try and replicate those found naturally in beef. Ali Francis, Bon Appétit, 19 Apr. 2022 Niacinamide, which is also called nicotinamide, is a form of vitamin B3 (niacin) found in supplements, skin-care products, and food. SELF, 22 Mar. 2022 In large doses, niacin can cause blurred vision and liver damage. Laura J. Nelson, Los Angeles Times, 14 Mar. 2022 Rice cakes also provide small amounts of the B vitamin niacin—which helps convert carbohydrates into fuel for the body to use—and trace amounts of other minerals, including magnesium and zinc. Cynthia Sass, Mph,, 4 Feb. 2022 The potent berry carries phytonutrients like carotenoids phenolics, anthocyanins, and flavonoids which help the body to resist fungi, bacteria and viral infections, and is high in vitamins A, B1, B2, niacin, albumin, iron, phosphorus, and calcium. Daphne Ewing-chow, Forbes, 31 Jan. 2022 Outside of retinol, avoid simultaneously using niacinamide and vitamin C; when mixed, the resulting niacin can cause redness. Rachel Nussbaum,, 9 Dec. 2021 The second disease is pellagra, caused by a dietary deficiency of niacin (vitamin B3) or the amino acid tryptophan. Stanley Stepanic, The Conversation, 14 Oct. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'niacin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of niacin

1942, in the meaning defined above

History and Etymology for niacin

nicotinic acid + -in entry 1

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Cite this Entry

“Niacin.” Dictionary, Merriam-Webster, Accessed 11 Aug. 2022.

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More Definitions for niacin


ni·​a·​cin | \ ˈnī-ə-sən How to pronounce niacin (audio) \

Medical Definition of niacin

: a crystalline acid C6H5NO2 that is a member of the vitamin B complex occurring usually in the form of a complex of niacinamide in various animal and plant parts (as blood, liver, yeast, bran, and legumes) and is used especially to lower LDL and triglyceride levels in the blood and to treat pellagra

called also nicotinic acid

More from Merriam-Webster on niacin

Nglish: Translation of niacin for Spanish Speakers Encyclopedia article about niacin


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