Topical retinoic acid was introduced for acne treatment three decades ago. Since that time, researchers have discovered thousands of different retinoids, derived from vitamin A. Today in 2014, these vitamin-A derivatives no longer serve as only an acne treatment, however, they even skintone, soften wrinkles, along with calming acne and inflammation. Since they are the closest product we have to a fountain-of-youth understanding how to maximize their benefit is worth the effort.

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