Ah, the sunscreen conundrum. Most of us would like to avoid skin cancer, as well as all the signs of visible aging associated with sun exposure. But so many sunscreens leverage questionable chemicals to help make that happen. According to the EWG, the top chemicals to avoid are retinyl palmitate and oxybenzone—plus things like unnecessarily high SPF, added insect repellent or aerosol cans. You can dig down into their sunscreen guide for product-by-product comparisons.