Planning an upcoming trip to the beach...this is the first summer I have been using Active C (La Roche-Posay)....I know C is supposed to help with photodamage, but is it OK to wear under my sunscreen for a day at the beach? (and if so, does it matter if it is a chemical or physical sunscreen?) Or could it cause a reaction & therefore be better to put it on after coming in for the day and cleansing?

Thanks for your help!

MsBee