There has been misinformation spreading alleging adverse health impacts from using dishwashers and dishwashing detergents and rinse aids. These claims use shoddy science and are aimed at scaring consumers. We’re here to answer your questions and set the record straight.
Q. Are dishwashers and dishwasher detergents safe?
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Both dishwashers and the detergents used in them are formulated with a strong emphasis on safety and performance. Dishwasher detergent is made with ingredients that effectively break down food residues and leave dishes sparkling clean, all while adhering to stringent safety standards set by the US Environmental Protection Agency (EPA) and individual company policies. Cutlery, glasses, dinnerware, and cookware cleaned in a dishwasher are safe to use. When paired with an effective dishwasher detergent that eliminates the need for pre-washing, dishwashers can significantly save both energy and water. |  |
Q. Can an ingredient used in dishwasher detergents and rinse aids called alcohol ethoxylate harm your gut health?
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 | These ingredients have been safely used in both detergents and cosmetic products for many years. Their safety profile is well-studied and documented. In fact, alcohol ethoxylates are listed on the EPA’s Safer Choice “Safer Ingredients” list, confirming their safe use in household products. |
Q. What does the science have to say about the safety of alcohol ethoxylates in dishwasher detergents and rinse aids?
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A study from 2023 titled "Gut epithelial barrier caused by dishwasher detergents and rinse aids" is often cited to support this false claim. However, despite what the title suggests, the study did not focus on household dishwasher detergents; moreover, the study actually concluded that no harmful effects from dishwasher detergents were observed, even at concentrations far above normal usage conditions. Scientific experts from the Center for Research on Ingredient Safety (CRIS) at Michigan State University reviewed this study and confirmed that “When used as directed, dish detergents and rinse aids are safe and effective.” |  |
Q. Does the Polyvinyl Alcohol (PVA) used in dishwasher detergent packs contribute to microplastics?
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 | PVA is a water-soluble polymer used to make dishwasher detergent packs. The grade of PVA used for detergents is specially designed to dissolve completely rather than forming microplastics. For more information on the safe use of PVA used in detergent products, please visit www.CleaningInstitute.org/PVA |
Experts Weigh In:
The New York Times took a look at the controversial study on ethoxylated alcohol and had scientific experts respond.
When used as directed, with the proper dilution, alcohol ethoxylates are considered safe for use. The referenced paper uses dilutions that are outside of the manufacturer’s requirements. - Joseph Zagorski, toxicologist and associate professor at Michigan State University's Center for Research on Ingredient Safety
When asked about the likelihood of alcohol ethoxylates used in dishwashing products affecting gut health, Thomas Wallach, MD, chief of pediatric gastroenterology at SUNY Downstate, responded:
The odds are pretty stacked against it.
Updated: March 31, 2026