When I’m in Hawaii, a lot of the beaches have signs asking people to not wear sunscreen, because it kills off the reefs. that’s all you need to know. if it’s killing the reef, it’s probably killing people. I never wear sunscreen, and I’m there for six weeks at a time sometime. I don’t get burnt, maybe a little red the first week, but after that, it’s just Brown. But I don’t spend all day in the sun. it’s different when you’re living there not vacationing.