Why Use a Retinol?
There are three types of retinoids used in anti-aging products, all with different levels of effectiveness: Retin-A, prescription strength retinoid, Retinol, an over-the-counter strength retinoid and retinyl, the weakest of the retinoids. Retin-A contains retinoic acid that fights anti-aging. The non-prescription retinol is converted to...