Ditch the Plastic: Why Wood Cutting Boards Protect Your Knives and Your Food

The plastic cutting board became standard in home and professional kitchens partly because of a reasonable assumption: plastic is non-porous, easy to sanitize, and therefore safer than wood for food preparation. The assumption is understandable. It's also not well supported by the research, and it ignores what plastic surfaces do to knife edges over time.

What the Research Actually Shows

Studies on cutting board hygiene, including work done at UC Davis in the 1990s that is still frequently cited, found that wood cutting boards are not more dangerous than plastic ones from a food safety standpoint. The research found that bacteria drawn into the wood grain died off and did not multiply, while bacteria on plastic surfaces, particularly in the knife scars that develop with use, survived and were difficult to remove even with scrubbing.

A new plastic board has a smooth, non-porous surface that is easy to clean. A used plastic board is covered in knife scars that trap food particles and bacteria in ways that are genuinely difficult to address. Wood, by contrast, has natural antimicrobial properties that are not fully understood but are consistently observed in the research.

What Plastic Does to Knife Edges

Hard plastic surfaces are significantly more abrasive to knife edges than wood. Every cut on a plastic board removes a small amount of metal from the edge. Over time this accelerates edge wear in ways that require more frequent sharpening and produce a shorter useful life for the blade. A knife used daily on a plastic board will need sharpening considerably more often than the same knife used on a properly maintained wood board.

This is not a minor consideration if you're using a quality knife. The surface the knife works against is part of the system. A well-made blade deserves a surface that doesn't work against it.

Wood Board Maintenance

A wood board requires more maintenance than plastic. It needs to be oiled regularly with food-grade mineral oil to prevent drying and cracking. It should be washed by hand and dried immediately rather than soaked or put in a dishwasher. Treated correctly, a quality wood board will outlast multiple plastic boards and perform better throughout its life.

End grain boards, where the wood fibers run vertically, are easier on knife edges than edge grain boards because the blade passes between the fibers rather than across them. They also self-heal to a degree after cuts. They cost more than edge grain boards but the performance difference is real.

The Practical Conclusion

Wood cutting boards are better for your knives, comparable or superior to plastic from a food safety standpoint when properly maintained, and more durable over time. The plastic board's reputation for safety is based on an assumption that doesn't hold up under scrutiny.

At Tanzo Cutlery in Las Vegas, every knife is built to perform over years of daily use. Using it on the right surface is part of getting that performance. View the Collection.