McDonald’s is the biggest fast food chain in the world, but unless you’ve worked there, you probably don’t know much about behind-the-scenes. Mike Haracz, who used to be a corporate chef at McDonald’s, has taken us inside the food giant and shared three things you probably don’t know. 3 things you don’t know about McDonald’s1. McDonald’s uses multiple suppliersThe first secret the ex-chef revealed in a TikTok video is the fast food chain uses multiple different suppliers. One reason for this is that McDonald’s is really large, and it’s also a safety net incase there are issues with one. Howeve…