I have had a problem picking at my skin for at least ten years. Although I never really had bad acne, I would just squeeze and pick at any little bump which would cause a pimple or a sore. I started taking a collagen supplement about a year ago, thinking that it would help with scarring (and also for a few wrinkles...) I started breaking out really bad with deep pimples...which of course I picked at. These pimples never really went away completely. Needless to say my skin has been absolutely terrifying for the past year. About two weeks ago I realized that the acne could be related to the collagen supplement. I stopped taking it and started taking high doses of vitamin C and 50 mg of zinc and it seems like my skin has really improved, but I'm trying not to get my hopes up. I also just added a vitamin E supplement. Has anyone experienced an increase in acne while taking a collagen and/or biotin supplement?? Any thoughts on this?? I wish everyone dealing with this problem the best of luck...this will get better!!