Well, at least wood pulp is non-toxic....
That is UNLESS is has begun fermenting!
Then you get toxic methyl alcohol :-(
Woodworkers can get a condition where cellulose wood-fiber as sawdust get on the eyes and wind up behind the eye where it can sit and ferment. This is bad since the methyl alcohol generated is toxic to the optic nerve!
Amazingly very many physicians are unaware of this danger :-( It can be tested for and treated easily by flushing behind the eyes.
I know crap like this because I’m a sad fat geek that can’t stop reading and never forgets a damned thing no matter how useless it was.