Tbh I wouldn't worry much about toxicity compared to the shit in GSR. Anecdotally I've never tried it but some people have tried something vegetable and it went sticky anyway. Cleaning guns regularly is enough of a pain in the ass already without maybe having to before going out shooting. I'd also never use it in a CCW or something ready for home defense because of that risk.
FireClean was notorious for trying to shut up a guy who disclosed that it's basically just canola oil with additives. But even so, there are many people who use it without it gumming up. When it happens, it's usually when you store a gun lubricated without using it for a long time.
