niacinamide
noun
ni·a·cin·amide
ˌnī-ə-ˈsi-nə-ˌmīd 
: a compound C6H6N2O of the vitamin B complex found especially as a constituent of coenzymes and used similarly to niacin
called also nicotinamide
Examples of niacinamide in a Sentence
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The fragrance-free formula nourishes both scalp and lengths, with hyaluronic acid, glycerin, ceramides, and niacinamide working together to hydrate, strengthen, and support a healthier hair environment.
—
Conçetta Ciarlo, Vogue, 30 Oct. 2025
Olay Regenerist Micro-Sculpting Cream The cream is formulated with skin-nourishing ingredients, like niacinamide to brighten the skin and strengthen its moisture barrier, amino peptides to firm and sculpt, and hydrating hyaluronic acid to plump fine lines and wrinkles.
—Alicia Geigel, Southern Living, 29 Oct. 2025
Belif's The True Cream Aqua Bomb is packed with the most hydrating ingredients on the block, like hyaluronic acid, niacinamide, and a ton of herbal goodies (like lady’s mantle) to soothe and cool your skin.
—Lily Wohlner, Allure, 29 Oct. 2025
CeraVe Blemish Barrier Patches are the first and only hydrocolloid blemish patches with three essential ceramides plus niacinamide, helping to soothe the skin while immediately reducing the appearance of all types of blemishes upon application.
—Adam Mills, MSNBC Newsweek, 15 Oct. 2025
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Conçetta Ciarlo, Vogue, 30 Oct. 2025
Olay Regenerist Micro-Sculpting Cream The cream is formulated with skin-nourishing ingredients, like niacinamide to brighten the skin and strengthen its moisture barrier, amino peptides to firm and sculpt, and hydrating hyaluronic acid to plump fine lines and wrinkles.
—Alicia Geigel, Southern Living, 29 Oct. 2025
Belif's The True Cream Aqua Bomb is packed with the most hydrating ingredients on the block, like hyaluronic acid, niacinamide, and a ton of herbal goodies (like lady’s mantle) to soothe and cool your skin.
—Lily Wohlner, Allure, 29 Oct. 2025
CeraVe Blemish Barrier Patches are the first and only hydrocolloid blemish patches with three essential ceramides plus niacinamide, helping to soothe the skin while immediately reducing the appearance of all types of blemishes upon application.
—Adam Mills, MSNBC Newsweek, 15 Oct. 2025
See All Example Sentences for niacinamide
Cite this Entry
“Niacinamide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/niacinamide. Accessed 8 Nov. 2025.
Copy CitationKids Definition
niacinamide
noun
ni·a·cin·amide
ˌnī-ə-ˈsin-ə-ˌmīd
: a compound of the vitamin B complex that is used like niacin
Medical Definition
niacinamide
noun
ni·a·cin·amide
ˌnī-ə-ˈsin-ə-ˌmīd
: a bitter crystalline basic amide C6H6N2O that is a member of the vitamin B complex and is formed from and converted to niacin in the living organism, that occurs naturally usually as a constituent of coenzymes, and that is used similarly to niacin
called also nicotinamide
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