What Is It? This toxic chemical, also known as benzopyrone, is both a naturally occurring and synthetically produced chemical scent. It can be found in after-shave, antiperspirant and deodorant, cologne and perfumes. And while naturally occurring coumarin shows little evidence of being toxic, the synthetic variety is anything but safe.

Health Risk: Perfume bottle addicts, take warning: Coumarin is a known immune-system and skin allergen, causing everything from mild irritation to severe dermatitis. What’s worse, it’s been banned as a food additive in the U.S.A. and many European countries due to its potential liver and kidney toxicity, yet not as an additive to topical products.

How To Avoid It: Steer clear of both monikers: coumarin and benzopyrone. To stay dry during even the most strenuous sweat sesh, we swipe on Soapwalla’s deodorant cream (yes, it really works!). And we adore the delectable scents of Lurk perfume oils, which come packaged in the cutest of miniature bottles. Bonus: You can meet the whole team this evening at our Night For Green Beauty!