What is Optimal Percentage of Tretinoin?
I am 23 and I currently do not have any wrinkles, however I have been using Tretinoin for the past year for the prevention of wrinkles as I have read it is best to start early. I started with 0.025% and now I can use 0.05% daily with no adverse side effects (only very minimal peeling). Now that my skin has gotten used to this percentage, should I move up to the 0.1% to further enhance collagen building and prevention of aging? Or should I stay at 0.05%?