Choose long-sleeve shirts and long pants made of tightly woven fabrics that you can't see through when held up to light. As children need added protection from the sun, keep infants in the shade and covered up with clothing. Reapply after swimming, perspiring heavily or drying skin with a towel. For total block, try zinc oxide. Remember, it doesn't have to be a sunny day for sun damage to occur.
Sunlight can reflect off water, sand, concrete and snow, and can reach below the water's surface.
If PBSA also causes DNA damage to intact human skin, researchers theorize it could increase a person's chance of developing skin cancer. But consumers could use more information about the properties of sunscreen and how their ingredients work. Weinstock said that better standards from the FDA on sunscreen use are needed. Weinstock also said that several elements affect the viability of sunscreens. Current information shows that the value of sunscreen in reducing skin cancer risk by blocking ultraviolet radiation clearly outweighs the potential dangers suggested by this study.