A chopping board could shed millions of plastic particles a year—the switch researchers suggest

Plastic chopping boards are popular for a reason. They are lightweight, easy to clean and often dishwasher-safe. But every time you chop vegetables or slice meat, your knife leaves tiny marks on the surface. And those marks may be releasing something you would rather not have in your food.

Researchers have investigated how much plastic chopping boards can release during everyday food preparation. Their findings raise an interesting question: is it worth switching to another material?

What the researchers discovered

A 2023 study published in Environmental Science & Technology examined the microplastic particles released from plastic chopping boards during chopping.

The researchers found that the type of plastic made a difference. Polypropylene boards released 5–60% more plastic by mass and 14–71% more particles than polyethylene boards.

Based on their calculations, the researchers estimated that a person could be exposed to between 14.5 million and 71.9 million microplastic particles a year from a polyethylene board. For a polypropylene board, the estimate was 79.4 million particles annually.

Those numbers sound alarming, but there is an important detail: these were estimates based on assumptions about chopping habits, not measurements of what people actually consumed over an entire year.

Should you be worried about microplastics?

The study shows that plastic chopping boards can release microplastics into food during preparation. It does not prove that using one will make you ill.

The researchers also tested the effects of polyethylene microplastics on mouse cells in a laboratory. They found no adverse effect on cell viability over 72 hours. However, this short test cannot tell us whether long-term exposure affects human health.

According to the Dutch Nutrition Centre, the health effects of microplastics are still uncertain. The findings are worth paying attention to, but they are not proof that every plastic chopping board poses a health risk.

Is a wooden chopping board the answer?

If you want to reduce the amount of plastic released during chopping, a wooden board is one alternative worth considering.

Wooden boards do not shed plastic particles, but they still need proper cleaning. Some people assume plastic is automatically more hygienic because it can go in the dishwasher. In reality, both materials have advantages and disadvantages.

Plastic boards can develop deep scratches where bacteria may remain, while wooden boards need to dry thoroughly after washing. Wood can retain moisture for longer, so putting a damp board straight into a cupboard is not a good idea.

As the Dutch Nutrition Centre explains, the condition of your board and how you clean it matter more than simply choosing one material over another.

What should you do with your chopping board?

You do not necessarily need to throw away your plastic board today. A few simple habits can help keep food preparation safer:

• Use separate boards for raw meat and fish and for foods such as salad ingredients that will be eaten without further cooking.
• Wash your board thoroughly after each use with hot water and washing-up liquid. Use the dishwasher if the board is suitable for it.
• Replace heavily scratched boards. Deep grooves can make proper cleaning more difficult, whatever the material.
• Let wooden boards dry completely before storing them.

The takeaway is simple: the research gives us a reason to think twice about worn plastic chopping boards, but it does not establish that switching materials will improve your health. If you are buying a new board, wood is a reasonable alternative. Whichever material you choose, keeping it clean and replacing it when it becomes badly worn should remain a priority.