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Recently, I have received some concerned questions as to whether or not it is okay to use retinoids and alpha hydroxy acids (AHAs) together. For the answer, I turned to the advice of my favorite dermatologist, Dr. Leslie Baumann. On Dr. Baumann’s blog, she states:
“Retinol is a highly effective ingredient, but it is unfortunately not a terribly stable one! Alpha hydroxy acids (such as glycolic acid and lactic acid) inactivate retinol, and the two should not be used together.”
As such, even products I love, like M.D. Forte Skin Rejuvenation Eye Cream, Alpha Hydroxy Acid with Vitamins A & E ($62.00, Drugstore.com), are less effective than formulations with retinol alone or alpha hydroxy acid alone. Good call, everyone, and thank you for calling this to my attention!