For many of us, skincare is far from simple. It’s difficult not to feel overwhelmed when perusing the aisles in drugstores, looking at everything from AHAs to hydrating serums — and don’t even get me started on retinol, retinal, and retinoids. I’m a beauty writer, so getting into the nitty gritty of each ingredient is what I signed up for. But no matter how many products I pick up and try, I always come back to a variation of the same three. Enter: CSA. DashDividers_1_500x100 Wh...