How Long Should You Let Retinol Soak In Before Applying Moisturizer?
I’ve been a believer in the benefits of retinol ever since I met Dr. Fitzpatrick over 30 years ago. At the time, he was the Chief of Dermatology at Mass General Hospital in Boston. Dr. Fitzpatrick was instrumental in getting tretinoin FDA-approved for the treatment of wrinkles (prior to that, it was only being used…