Ignacio Escallon, an avid cyclist, knew something was wrong when he felt unusually tired.

While it may help prevent sunburns, sunscreen with an SPF below 15 provides no protection from skin cancer or wrinkles. SPF 30 filters out about 97% of harmful UVB rays, SPF 50 blocks about 98%, and SPF 100 can protect you from 99%. Sunscreen tipsWear SPF 30 or higher sunscreen every day. Sun protection for babies and childrenProtecting the skin as a child and teenager can significantly reduce the risk of skin cancer and premature skin aging as an adult. The Food and Drug Administration advises that babies younger than 6 months do not wear sunscreen, but rather stay out of the sun altogether or wear with clothing with UPF (Ultraviolet Protection Factor) built in.