that is true. never use a BP over differin, retin-a, etc. i use retin-a in the morning now and BP at night since it takes BP longer to soak into the skin. Just use one in the morning and the other at night and you will benefit! i didn't like differin, didn't do anything for me, so my derm switched me to retin-a micro and i love it. also, think about adding a BHA into your regimen. i broke out at first, but now my skin is starting to look and feel wonderful. good luck!