Because I know that AHA makes you more sensitive to the sun, normally I’ll put SPF on over it. But yesterday, because I thought I was just running a few errands and wouldn’t be in the sun very long, I decided against the SPF step. I was out for a couple of hours, getting in and out of my car, walking to and from, here and there. I really wasn’t out in the sun all that long, but still, my forehead got quite red. I just wanted to share my experience as a little warning to everyone who is using, or about to use, AHA. We have to be more cognizant of sun exposure while applying this stuff.