Most kitchens have a plastic cutting board, but a 2023 study found that chopping on one can shed tens of millions of microplastic particles a year straight into your food

If you’re like most people in the US, you probably have a plastic cutting board sitting in your kitchen drawer right now. It’s cheap, dishwasher safe and never really occurred to you as a health hazard. But a 2023 study published in the journal Environmental Science & Technology found that simply chopping your vegetables could be sending tens of millions of microscopic plastic particles into your dinner every year. Every slice, dice, and chop destroys your cutting board, and those shavings end up in your food.

What the researchers actually did
North Dakota State University scientists headed a team hoping to answer a practical question: how much plastic are we really eating just from food prep? In the 2023 study, ‘Cutting Boards: An Overlooked Source of Microplastics in Human Food’, researchers had people cut carrots on the two most common types of plastic used in cutting boards sold in the US, polythene and polypropylene, then collected and analyzed the debris using FTIR spectroscopy, a technique that can pinpoint the exact chemical makeup of tiny particles.

The numbers are hard to ignore
Polypropylene boards gave off 5 to 60 percent more microplastic mass and 14 to 71 percent more particles by count than polythene boards, the study said. Researchers estimated that a person could be exposed to between 14.5 million and 71.9 million polythene particles over a year, or up to 79.4 million particles annually from a polypropylene board, based on normal chopping habits. That amounts to about 7 to 50 grams a year from a polythene board and about 49.5 grams a year from a polypropylene board, by weight.


That’s about the weight of a golf ball, but as plastic pieces. The research found that these particles tended to be spherical and smaller than 100 microns, thinner than a human hair, with a “bottom-skewed” size distribution, meaning smaller particles were much more common than larger ones, the authors said

Chopping style, and even carrots, make a difference
The researchers found that how you chop makes a difference. A well-used and worn board will release more particles. So an old, heavily scarred cutting board is probably worse than a new one. Chopping real vegetables like carrots released more microplastics from polythene boards than when the board was empty, because the extra friction caused more wear. This is not some worst-case scenario in a lab; it is close to what an average weeknight looks like when you're cooking dinner.

Should you actually be worried?
This is where it gets tricky. In the same study, the team also exposed mouse cells to polythene microplastics for 72 hours and discovered no significant impact on cell survival. This is a very early, short-term finding in isolated cells, not in actual humans. So it doesn’t prove that chopping vegetables is safe in the long term, nor does it prove harm. It’s just that this limited test wasn’t alarming.

But the larger issue of what microplastics do within the human body is a serious and active research question. A 2024 study in the New England Journal of Medicine found that when researchers looked at plaque removed from patients' carotid arteries, those with detectable microplastics and nanoplastics in their plaque had a significantly higher risk of heart attack, stroke or death over about three years of follow-up, compared with patients with no detectable particles. That research was looking at plastic exposure more generally, not specifically at cutting boards.

The authors were careful to say the findings show an association, not proof that microplastics directly cause these results, as other unmeasured factors may be at play. Still, it’s one of the reasons scientists are looking more closely at common ways we’re exposed to plastic, even in our kitchens.

What you can actually do about it
Don’t toss your cutting board just yet, but some small habits can help. One of the easiest things you can do is swap out plastic boards when they get badly scratched or grooved. More wear usually means more shedding, and this was directly documented in the same study. Wood boards are a popular plastic-free alternative. But it’s worth noting that in the same research, wood boards shed more microscopic particles by mass than plastic ones in some tests. So wood isn’t automatically the safer bet by particle count; it’s just a natural material instead of plastic. Some are opting for solid options like stainless steel or glass for produce consumed raw.

In the end, this study suggests that the everyday kitchen habits we take for granted can add up in quiet ways. Microplastic exposure from plastic cutting boards is real and deserves attention, not panic.