Niacinamide (also known as nicotinamide) is a topical form of niacin or vitamin B3 that's often used in the treatment of rosacea or redness, wrinkles, and hyperpigmentation. This product became famous because it helped many to improve their skin. It removes wrinkles and nourishes and calms redness and inflammation with no side effects. It has similar effects of retinol by strengthening the skin barrier, [and] fortifies [skin] from the get-go without sensitivity or irritation. It also acts as an antioxidant by limiting free radical damage.