Hi there - this is my first time posting here, but I just wanted to share that I "accidentally" cured my peeling lips. I suffered for years with this this problem. First, I had cracked corners and that was from eating too much sugar....I cut down on Sugar and cured all yeast infections and that went away. My lips were still dry and peeling. I took gobs of Vitamin B2 for another problem and noticed that my chronically chapped lips disappeared. I took like 3 - 5 of the 100 mg tablets per day for weeks and then my lips got better. I don't take that much anymore, I just take a B-complex daily and my lips are no where near peeling like they use to....they get dry, so I try apply natural moisturizer, but my lips are healed. So, I think it is a deficiency of the B vitamins.