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The two are often believed to be interchangeable, but the main difference is that retinol is eventually converted into retinoic acid. Retinol is a natural form of vitamin A, while Retin-A is derived from retinoic acid, a synthetic derivative of vitamin A, and considered pharmaceutical.
There are many different products available for treating fine lines and wrinkles that are caused by aging, and two of the most popular are Retinol and Retin-A; however, many people do not understand that there are a number of differences when it comes to Retinol vs. Retin-A.