Who’s ready for some horror stories about the way food is processed? Some people don’t really want to know how the sausage gets made because frankly, it’s gross.

From rodent-based food additives to chemical preservatives to non-food elements showing up on our plates, we usually have no idea what actually goes down at the manufacturer. Time to look behind the curtain, people.

1. Canned Mushrooms

Canned mushrooms should be a reliable shortcut when you’re cooking dinner, but it’s not worth it when you realize that the FDA has specified that each can may legally contain 20 or more maggots.

Yep, maggots – those wiggly white worms that grow up in rotting meat, or on mushrooms apparently. There are acceptable levels of insects, rodent hairs, and other “objectionable material” for all of our processed foods, but mushrooms happen to be one of the worst offenders.