What it is
A natural composite — cellulose fibres in a lignin matrix — used solid for boards, spoons and trays. Mildly porous, slightly acidic, and containing not a molecule of petrochemical polymer. When your knife scars it, it releases wood dust, not polyethylene.
Why it’s safer
Two independent lines of evidence. First, the microplastics one: chopping on plastic boards is estimated to hand you 14–71 million plastic microparticles a year (ES&T, 2023) lab; a wooden board simply has none to give.
Second — the counterintuitive one — the microbiology favours wood. The classic Wisconsin work (Ak, Cliver & Kaspar, 1994, continued at UC Davis) put E. coli O157:H7 and Salmonella on wooden and plastic boards: on wood, the bacteria became unrecoverable from the surface within minutes and died inside the wood without multiplying; knife-scarred plastic, once greasy, proved effectively impossible to clean by hand, and more bacteria were recovered from used plastic than used wood (research overview) lab. The “unhygienic wood” instinct is folklore; the evidence points the other way.
The honest caveats
Wood sheds too — it just sheds wood. The same 2023 study found wooden boards sloughed 4–22× more microparticles by mass than plastic ones in some tests; neither wood nor polyethylene particles affected mouse-cell viability in vitro lab. The advantage is what the particles are — biodegradable cellulose your gut has processed since forever — not their absence. I’d rather eat sawdust than cling film, but let’s be precise that I’m eating one of them.
The glue is the plastic. Laminated and “bamboo” boards are strips bound with adhesive — sometimes melamine-formaldehyde or urea-formaldehyde resins. One-piece (or verified formaldehyde-free-glued) timber avoids the question (CEH guidance); and Germany’s BfR flatly advises against “bamboo-ware” tableware for hot food agency.
Maintenance is non-optional. Hand-wash, stand to dry, oil occasionally (food-grade mineral oil is, ironically, a petroleum product — beeswax or fractionated coconut oil if that bothers you). No dishwasher. Deeply cracked boards retire.
What I do
A wooden chopping board is literally next on my kit list — the rolling pin and walnut serving tray arrived first, which says something about my priorities. The board I buy will be one-piece hardwood, and the plastic boards it replaces go to non-food duties.