The Environmental Working Group (EWG) tested 1,606 sunscreens and found that 3 out of 5 offer inadequate protection from the sun or actually contain toxic ingredients.
The Food and Drug Administration does not require UVA filters in sunscreens, and most manufacturers have never included them in their formulations.
Most sunscreens protect from UVB, or sunburn radiation. Higher SPFs indicate more protection. Far fewer brands contain ingredients that block UVA radiation, even though a growing number of studies show it is even more harmful than UVB radiation.
EWG tested leading sunscreens from name brands like Coppertone, Banana Boat, and Neutrogena, and the results were not pretty. Despite improvements, 42% of tested sunscreens still contained the chemical oxybenzone, a hormone-disrupting chemical that readily absorbs through human skin.
http://www.ewg.org/cosmetics/report/sunscreen09/investigation/summary-of-findings
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