Sunscreen, College Level Course Posted on June 21, 2017 By Sutton Dermatology + Aesthetics Written by Margaret Kontras Sutton, M.D. Now that you know the basics we are ready to move on to advanced information about sunscreen. Patients often ask me “How long does my bottle of sunscreen stay fresh?” If you are using sunscreen in generous enough amounts, one bottle should be lasting only a few weeks. But … Read More