In its 2011 position statement on sunscreens, the Nanodermatology Society states that it “believes that nano-based sunscreens do not pose serious health risks to consumers,” and agrees with the Environmental Working Group (EWG) that “[z]inc and titanium-based formulations are among the safest, most effective, sunscreens on the market.” According to the position statement, this is

In a March 2, 2010 letter, the Food and Drug Administration (FDA) responded to the Environmental Working Group’s (EWG) July 15, 2009, letter concerning sunscreen guidelines. EWG criticized the FDA for not having guidelines for sunscreen safety and efficacy. According to EWG, companies continue to profit by misleading consumers about the protection offered by their products. EWG