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Prescription-only treatments for acne (as well as other skin issues such as wrinkles and some of the visible symptoms of prolonged sun exposure) contain ‘Retinoic Acid’; Retinoic Acid is the actual ‘magic ingredient’ that the body needs for optimal skin health, and is naturally produced by the body from Retinol, though Dana Sachs, an associate professor of Dermatology at the University of Michigan Medical School, advised that "there is a lot of literature showing that while Retinol is more gentle than Retinoic Acid, biochemically it does exactly the same thing – it may just take longer to see results".4