What number of individuals have you seen get to the shoreline, spread out their covers, strip down to their bathing suits, and after that begin slathering ceaselessly? "You really need to apply your sunscreen 30 minutes preceding introduction," says Jeannette Graf, MD, colleague clinical teacher of dermatology at Mount Sinai Therapeutic Center in New York. That way, it has room schedule-wise to get consumed and begin working—thus you don't get UV introduction for those initial couple of minutes when you