Niacinamide

Niacinamide, also known as nicotinamide, is a form of vitamin B3 found in food and used as a dietary supplement and medication. As a supplement, it is used by individuals to prevent and treat pellagra, a disease caused by niacin deficiency.

Topically, niacinamide is an ingredient in some skincare products. It is used in cosmetics for its reported benefits to skin health, such as reducing inflammation and improving skin barrier function.