Since I’ve been using the 10% AHA every morning, my skin is much more sensitive to the sun, necessitating a good SPF during the day. I was using a zinc oxide based SPF for the first few weeks with great results. My skin was 100% clear. Then, against my better judgement, I decided to try an avobenzone based sunscreen. Avobenzone based sunscreens have always caused breakouts for me in the past, but I like how they go on less white than zinc oxide based sunscreens. Thanks to the AHA I managed to use the avobenzone for a few days with no problems, but finally did end up with a few small comedones. Me no like. I immediately went off avobenzone and back on a zinc oxide SPF and the breakout is fading. This is probably the fourth time an avobenzone based sunscreen has caused me problems. I guess I’m ready to declare that avobenzone is comedogenic at least on my skin.