Source: The Amount of Wood Pulp in Grated Parmesan Cheese May Surprise You
fta:

this is why I prefer to grate the good stuff. doubtful wood cellulose is bad, but…
Bon Appetite has an good article on this. Why Wood Pulp In Your Parmesan Won’t Kill You. tl;dr: safe to eat, reduces need for other fats, keeps things dry, adds fibre.
“But it could also have been made in part from a crateful of apples that didn’t make it onto supermarket shelves, or corn husks, or any variety of plant matter. It could even have been made from the crate the apples came in. By the time it becomes cellulose, it’s pretty much just a tasteless powder whose primary purpose in life is to take up space… It’s like an accountant at a rock concert after-party.”


