Summer has finally arrived, which means that “selfie season” is now under way, from a beach vacation to your college roommate’s wedding. But if your smile seems more lackluster than pearly white these days, you might be feeling self-conscious about the seemingly endless stream of photo ops. But don’t spend your summer agonizing over finding a flattering Instagram filter or––worse––dodging cameras altogether. Instead, brighten your smile with these natural, gentle solutions that combine homeopathic remedies,…