Nicotinamide, also known as niacinamide, is a form of vitamin B3 that plays a crucial role in cellular metabolism. It helps convert food into energy and is essential for the proper functioning of enzymes in the body. Nicotinamide is found in various foods, including meat, fish, and green vegetables, and can also be taken as a dietary supplement. In addition to its metabolic functions, nicotinamide is known for its benefits in skin health. It is commonly used in skincare products due to its ability to improve skin barrier function, reduce inflammation, and enhance overall skin appearance. This makes it a popular ingredient for those seeking to address issues like acne and aging.