Nicotinamide is widely used in the skincare industry for its anti-aging and skin-repairing properties. It helps reduce the appearance of fine lines, wrinkles, and hyperpigmentation while improving skin elasticity. In medicine, it is employed as a treatment for pellagra, a condition caused by niacin deficiency, and is also being studied for its potential benefits in managing diabetes and reducing inflammation. Additionally, nicotinamide is used in dietary supplements to support overall cellular health and energy metabolism. Its role in DNA repair and cellular maintenance makes it a valuable component in both cosmetic and therapeutic applications.