i have an old and much loved wooden chopping board that is constructed with
strips of wood that are glued together. at one place the wood strips are
bending away from each other leaving a thin crack.

since its unhygienic, i want to fill it in with something. I have some PVA
waterproof adhesive which is quite thick and would probably fill the crack
up well, but would this be unadvisable using a chemical adhesive like PVA ?
thanks for any advice.