Flavin refers to a group of yellow pigments derived from the vitamin riboflavin, also known as vitamin B2. These pigments are essential for various biological processes, including energy production and cellular function. Flavins play a crucial role in the metabolism of carbohydrates, fats, and proteins, helping the body convert food into energy. In addition to their biological importance, flavins are also used in various industrial applications, such as food coloring and cosmetics. They are known for their antioxidant properties, which can help protect cells from damage caused by free radicals. Overall, flavins are vital for both health and industry.