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| SEARCH BY BRAND SHOP BY CATEGORIES SHOP BY SKIN TYPE | Factor-A LineThe Factor-A and A Plus Line utilizes new stabilization and delivery components to deliver retinol to the skin in a stable fashion where it is converted by certain enzymes into retinoic acid. This method helps avoid superficial redness, peeling and irritation. Some recent studies demonstrate that a stabilized retinol may be more active in the skin than retinoic acid. Sort By : Sort By : |