(iStock) Parade.com has an extensive editorial partnership with Cleveland Clinic, consistently named as one of the nation’s best hospitals in U.S. News & World Report’s annual ‘America’s Best Hospitals’ survey. Click here to learn more about our health reporting policies.Daily sunblock use is a skincare must, plain and simple—after all, it’s your strongest line of defense against skin cancer and premature signs of aging, like wrinkles and dark spots. But the sunscreen aisle can be overwhelming, especially if you don’t know what you’re looking for.