| Wear a sunscreen or sunblock with a minimum SPF 15, says the American Academy of Dermatology. |
| Apply the sunblock at least 15 minutes before going outdoors, and reapply it after prolonged physical activity. |
| You must always reapply your sunblock after about an hour and a half, give or take how light you are. |
| Sunblocks containing powdered titanium dioxide or zinc oxide dispersed in a base of petroleum jelly became available over 50 years ago. |
| Look for sunblocks and protective moisturizers with zinc or titanium dioxide. |
| Instead of sunscreens, use sunblocks, which are less irritating to sensitive skin. |
