An international team of scientists warned on Mar. 31 that common antibacterial soaps, wipes, sprays, and other germ-killing household products may be contributing to the global rise of antimicrobial resistance (AMR) without providing extra health benefits for most consumers. The researchers said these everyday items are quietly fueling a public health threat that already causes more than one million deaths worldwide each year.
Antimicrobial resistance is considered a major challenge by the United Nations Environment Programme, which predicts it could rival cancer as a leading cause of death by 2050. Most AMR prevention efforts have focused on reducing antibiotic overuse in healthcare and agriculture settings. However, the scientists—who come from universities and institutes in the United States, Canada, Brazil, and Switzerland—said there is growing evidence that biocides commonly found in household products can also promote bacterial resistance not only to those chemicals but to critical antibiotics as well.
"Global AMR strategies have focused on hospitals and farms while overlooking everyday products used in homes that may contribute to resistance," said Miriam Diamond, professor at the University of Toronto. "Biocides from soaps and disinfecting products are washed down millions of household drains every day, entering wastewater systems and the broader environment where they create ideal conditions for bacteria to adapt and become harder to kill. With little evidence of health benefit, these uses should be a clear target for AMR prevention."
The researchers highlighted quaternary ammonium compounds (QACs) and chloroxylenol as examples of biocides added to hand soaps, wipes, sprays, laundry sanitizers, plastics, textiles, and personal care items—products whose use increased during the COVID-19 pandemic. They summarized laboratory studies showing environmental levels of these chemicals can help resistant bacteria survive longer and spread more easily by promoting cross-resistance with antibiotics or causing lasting genetic changes.
Major health authorities such as the U.S. Food and Drug Administration (FDA), Centers for Disease Control and Prevention (CDC), and World Health Organization recommend handwashing with plain soap rather than antibacterial soap for general use. The authors called on WHO to include consumer-product biocides in its next Global Action Plan on AMR by setting reduction targets supported by environmental monitoring.
"The overuse of biocides in consumer products is low-hanging fruit in the fight against AMR," said Rebecca Fuoco, Director of Science Communications at Green Science Policy Institute and doctoral student at Johns Hopkins University. "By phasing out unnecessary antibacterial additives, we can reduce chemical pollution, protect public health, and help slow the spread of superbugs."
