Want an all-natural relationship with the sun? Get a load of Kiss My Face Sun Screen SPF 18 with Oat Protein Complex ($11.95 at Kiss My Face), chock-full of titanium dioxide and zinc oxide. "These ingredients are physical blockers that work by reflecting the rays," says Krant. But a sunscreen's effectiveness is enhanced by your diligence. "The best protection is achieved by application of a sunscreen 15 to 30 minutes before exposure, followed by one reapplication 15 to 30 minutes after sun exposure begins," says Dr. Brian Bonanni, medical director of Gotham Skincare.