I have 0.1% cream and gel version of Tazorac, but I read only the cream is approved by FDA for treating photodamage. Will the gel not work? I've heard the gel version is stronger so would it be more effective if it does work for treating photodamage? 0.1% tretinoin vs Tazorac which is better for improving photodamage? I read tretinoin binds to more receptors what is the difference? Does this mean tretinoin is superior since Tazorac does not bind to alpha receptors if so in what way is it better?