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I'm 49 and I've had cystic acne my whole life. I've tried everything to heal. Different things have helped but never actually stopped the acne from happening. Recently I read about Biotin and how it helps hair growth and skin. So I tried 7500 mcg of Biotin ........... Serious I've had zero cystic bumps in 10 days! I'm not selling a brand I'm not selling anything. I just wanted to share my experience. Maybe this will help someone.