Vitamin B-2 is a supplement used in acne, rosacea, depression, migraine headaches, cataracts, Xhrohn's disease, HIV, Vitamin b-2 deficiency (not enough Vitamin B-2 in the body) carpal tunnel syndrome, and sickle cell anemia. Other names for Vitamin B-2 include : Riboflavin. Check with your doctor before taking Vitamin B-2