Are plastic cutting boards useful kitchen tools or a breeding ground for microplastics? Here’s what to know

It’s important to note, however, that the study’s findings are limited — researchers conducted testing on mice and only tracked health effects for about three days after exposure. Plus, microplastics are difficult to quantify — if another team of researchers did the same study, their findings may vary, says Hoaran Wei, an assistant professor in the department of civil and environmental engineering at the University of Wisconsin-Madison.