Natural Factors Vitamin B2 is also known as riboflavin, it is a water-soluble vitamin that is an important factor in the maintenance of good health. Provides 100 mg of riboflavin per daily dose, helping to metabolize proteins, fats and carbohydrates while providing antioxidant support. Riboflavin is also necessary for red blood cell formation, antibody production, cell respiration and growth and works as an antioxidant to track down and destroy free radicals in the body. Riboflavin functions in the metabolism of proteins, fats and carbohydrates, enabling the body to release energy from these nutrients and making them available to tissue cells. It also supports healthy vision and helps maintain healthy skin. As riboflavin is not stored in the body, it must be added to the diet daily either through food sources or through supplementation.