Sun Protections Pays OffEven though the sun boosts vitamin D intake and ramps up serotonin (those fun feel good brain chemicals), you probably hadn't counted on your vacation being the precipice for the slippery slope to old age. The bottom line is that sun exposure just isn't healthy, says Dr. Craig Eichler, dermatologist and president of the Florida Society of Dermatology. "A tan is what skin looks like...