Interestingly, the EWG gave its green or favorable rating only to products that contain zinc oxide or titanium dioxide, two blockers that don't get absorbed into the skin and are considered pretty innocuous. But Lim says that some dermatologists have expressed concerns about the use of these compounds in people who have inflammatory skin conditions like eczema. Tiny cracks in the skin of people with eczema could allow these compounds to enter the bloodstream. "Since the body can't metabolize these compounds, they can collect in the body over time," with unknown effects, says Lim. For this reason, he says it might be a good idea for those with skin problems to avoid those compounds or use sunscreens without them.
4. Don't forget the hat, coverup, and sunglasses. All of these provide protection where sunscreens can't. Sunglasses, for instance, protect you from cataracts and also protect those areas around your eyes where you can't apply sunscreen. Clothes to cover your midriff, shoulders and back provide added protection in between those dips in the ocean or pool. And a hat will protect your scalp from sunburns. Even while promoting the use of sunscreen, the American Academy of Dermatology calls it just "one component of a daily photoprotection regimen." We shouldn't forget the others.
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