Image: danjo/Flickr

There are many bad things to worry about. Be it climate change, diseases, rabid dogs or ticks, life is just chock full of worry. So, hereā€™s another thing: virtually everything in your medicine cabinet. Sorry :(

Donā€™t freak out, because thereā€™s not enough information to know how bad the chemical is, and well, the human lifespan is still around 80 years. But scientists have found an antimicrobial chemical in ā€œhand lotions, toothpastes, mouthwashes, nasal sprays, lozenges, deodorants, intravaginal sponges, and in multidose pharmaceutical formulations, such as eye dropsā€ that could potentially have negative consequences on human cells.


The chemicals in question are quaternary ammonium salts, or QUATS. Researchers first discovered their antiseptic qualities in the ā€˜30s and since then, as folks have tended to do with chemicals in the past, they put them in lots of products. The FDA decided that QUATS in ā€œover-the-counter consumer antiseptic products intended for use with waterā€ were no longer generally recognized as safe in 2016. So the researchers decided to study some QUATS effects on how one part of cells, the mitochondria, functioned.

Obviously, the chemical was bad.

After treating the mitochondria with some of the QUATS, the researchers noticed that ten of the chemicals caused the mitochondria to use less oxygen and produced less ATP, the molecule the body uses for energy. If you remember biology class, the mitochondriaā€™s literal job is to consume oxygen and produce ATP. There are other bad things QUATS do that researchers already know about, like cause reproductive issues in mice.


There are certainly caveats here: The study was done in a cell culture, not in humans, and done with the individual chemicals, not with the products the chemicals come from. Scientists just donā€™t know how these products are affecting our cells yet. ā€œTissue-level exposures resulting from the use of personal care products that contain these compounds are unknown,ā€ they write in the paper, published in the August issue of Environmental Health Perspectives. The National Library of Medicineā€™s TOXNET says of cetylpyridinium chloride, the QUATS the researchers spent the most time on: ā€œSignificant toxicity is rare after exposure to low-concentration products that are typically available in the home.ā€

Have you read White Noise by Don Delillo? I just finished it. The main characterā€™s biggest fear is death, then heā€™s exposed to a chemical. No one really knows what the chemical does (except for the fact that itā€™s toxic), but he freaks out anyway, feeling like he now has an expiration date on his life.

Anyway, hopefully this article doesnā€™t do that to you, because scientists donā€™t know QUATSā€™ effects for sure, nor do they know whether the risk of the QUATS outweighs the risk of the bacteria they kill. So anyway, sorry. The 21st century is just a stressful time.


[Environmental Health Perspectives]