This simply doesn't pass the common-sense test:<p>> <i>“Our study assumes that the average person makes 500 cuts per day on a board, or over the course of a year, 128,000 cuts. Given those numbers, the cumulative microplastics exposure ranges from 7.4 to 50.7 grams per year.”</i><p>> <i>For context, a plastic credit card weighs about five grams, so the highest end of this estimate amounts to 10 credit cards per year, shed onto your board and food.</i><p>I have several plastic cutting boards I've used close to daily for probably 10 years. But they still have the same shape and weight as when I bought them, based on simple visual inspection. Yes, the surfaces are positively covered in probably hundreds of thousands of scratches from each cut I've made, but the surface is still visibly the same height in the middle of the board where it's most scratched, vs. the edges that don't have any scratches at all.<p>Yet according to this "study" my cutting boards ought to have developed entire holes in their middles by now.<p>I can quite confidently say that I haven't removed even one credit card's worth of plastic in a decade. A tiny fraction of a credit card's worth across all the boards, maybe.