Can they be mixed? Yes, but do it right

Since retinol, AHAs, salicylic acid, etc. can all cause increased sun sensitivity, a good sunscreen is clutch. However, don't go adding it in willy-nilly. Products with SPF 30 and above actually don't mix well with most active ingredients. The key is to "layer the sunscreen OVER the product with active ingredients," explains Patel.

Image via @supergoop