niacin

noun

ni·​a·​cin ˈnī-ə-sən How to pronounce niacin (audio)
: 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 Symptoms of niacin toxicity include flushed skin, itching sensations, feelings of nausea, headaches, vomiting episodes, dizziness, and pain in the upper abdomen. Allison Futterman, Discover Magazine, 10 Apr. 2024 Researchers recommend that people should stop taking niacin supplements unless there is a medical need for them. Staff Author, Health, 14 Mar. 2024 Doran was surprised to learn that niacin could be involved in driving up the risk of heart disease. Linda Carroll, NBC News, 19 Feb. 2024 New research suggests that too much of the essential B vitamin niacin can contribute to cardiovascular disease. Staff Author, Health, 14 Mar. 2024 The research resulted in the discovery of a substance in some of the blood samples that is only made when there is excess niacin. Linda Carroll, NBC News, 19 Feb. 2024 Serious side effects are more common if between 2,000 to 6,000 milligrams of niacin is taken a day. Arianna Johnson, Forbes, 21 Feb. 2024 In addition, Yegorova highlights niacin (also known as vitamin B-3) for sometimes creating an odd side effect. Carina Woudenberg, Discover Magazine, 23 Jan. 2024 Pantothenic acid, also known as vitamin B5, helps to regulate oil production and prevent breakouts, while niacin (vitamin B3) promotes healthy blood flow and reduces inflammation. Amber Smith, Discover Magazine, 1 Aug. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'niacin.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

nicotinic acid + -in entry 1

First Known Use

1942, in the meaning defined above

Time Traveler
The first known use of niacin was in 1942

Dictionary Entries Near niacin

Cite this Entry

“Niacin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/niacin. Accessed 20 Jun. 2024.

Kids Definition

niacin

noun
ni·​a·​cin ˈnī-ə-sən How to pronounce niacin (audio)
: an acid of the vitamin B complex that is found widely in plants and animals and is used especially against pellagra

called also nicotinic acid

Medical Definition

niacin

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

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