Can triclosan in cutting boards harm your liver?
EPA says triclosan uses can include indirect dietary exposure from cutting boards, and a 2026 rat study linked lifelong triclosan exposure with liver fibrosis. This does not prove one cutting board harms your liver.
What's actually in it
Triclosan is an antimicrobial chemical used to slow the growth of bacteria, fungi, and mildew. Some treated materials can use triclosan as a preservative.
Not every cutting board contains triclosan. The concern is with products marketed as antimicrobial or antibacterial.
What the research says
The U.S. EPA says triclosan uses can lead to indirect dietary exposure from triclosan in cutting boards, countertops, paper, adhesives, ice-making equipment, and conveyor belts.
A 2026 Archives of Toxicology study exposed offspring rats to triclosan through the placenta, milk, and after weaning. The study found lifelong triclosan exposure increased markers tied to collagen production and hepatic fibrosis.
This does not prove one treated cutting board harms your liver. It does support skipping antimicrobial claims when you buy kitchen tools. Choose a plain wood cutting board, then wash and dry it well after use.