TikTok user Jordan Howlett, 26, claims to know some juicy secrets about the big junk food chains, including McDonald's. "That's why French fries taste so good," he adds, "but that's probably bad news for vegetarians." The Post reached out to McDonald's for comment but did not arrive.

In 1990, after a legal dispute, the fast-food chain switched to pure vegetable oil, but customers craved the same fleshy taste. It wasn't until 2001 that vegetarians and Hindus, who do not eat meat for religious reasons, sued the chain for failing to provide the exact details.