The bamboo will be glued together with something like polyurethane though. That makes up a smaller percentage of the board of course.
Or then just give up and live with my plastic cutting boards...
There are so many neat cutting boards available, with suitably eye watering prices. I made I nice Rimu one (though admittedly it was glued) out of old house framing that was otherwise going to be binned. Chopping down these ancient hardwood trees for house framing is depressing to think about. https://gatherandyou.co.nz/products/handmade-rimu-chopping-b...