Natural Factors Vitamin B2 - 100 mg - Necessary for red blood cell formation, antibody production, cell respiration and growth, Vitamin B2 (Riboflavin) is an important B Vitamin for all aspects of cell development and health. Especially important for pregnant women, in which Vitamin B2 deficiencies may damage the developing fetus, but not manifest themselves to the expecting mother, Vitamin B2 can also relieve eye fatigue, and aid in the prevention and treatment of cataracts. As an immune enhancer and a regenerator of skin, hair and nail tissue, proper daily intake of this important B vitamin should be of concern to everyone.