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Specifically, I'd like to talk about an ingredient called thimerosal or thiomersal. This is a compound that's 50% mercury. While it is banned as a cosmetics ingredient in the E.U., Korea, and Japan, the FDA still allows it to be used in most makeup products made in the U.S.
Yes, that includes mascaras. Check out the ingredients in yours! Studies have shown that a percentage of users are allergic to it, or might eventually develop an allergic reaction from continuous exposure to this ingredient.
Last note of caution: throw out your mascara after 3 months. Don't risk your eyes. It's not worth it.
Photo: Lin Pernille