Most experts agree people should use sunscreens to protect their skin from the sun , but there is wide disagreement on how well they actually work. In addition, other than sunburn prevention, little is known about their safety . … at Johns Hopkins and chairman of the Skin Cancer Foundation’s photobiology committee that tests sunscreens for safety and efficacy says, “Using this scale (rating) to say a sunscreen offers good protection or bad protection is junk science.” …
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