Not sure how much or how little sun might damage your skin? We're here to give you tips on the best formula and SPF for your unique needs. Most people need sunscreen on at least their faces each and every day of the year, and for this purpose, a light, non-greasy formula with an SPF of 15 will suffice. And in the summer, that level of protection is perfect for tan-aholics who still want to catch a few rays for that sunkissed look without going totally bronze or damaging their skin. Ratchet up your SPF to 30, and you'll prevent the signs of aging and protect your skin from melanoma. Look for ingredients such as vitamin C, vitamin E and other antioxidants to help out the antiaging properties of sun protection. If you wear makeup, then why not invest in foundation or powder that contains SPF? You'll add another layer of protection on top of your moisturizer, which likely has an SPF of 15 or more.