I stopped eating red meat as a teenager. As an adult, every few years or so I'll get a craving for a hamburger. If I give in to the cravings and attempt to eat a hamburger, I always get a terrible multi-day stomach ache from it. Someone explained to me once that when you stop eating beef for a long time, eventually your body stops producing the enzymes necessary to break it down. I believe that's what happened with me - I didn't eat beef for years, then wasn't able to break it down when I did try to eat it. It just sat in me, not digesting, and caused pain & nausea until it finally left my system. So, inflammation or not, if you don't eat beef for awhile, you may not have the ability to digest it at all later on.
I will say - when I have these beef cravings, I've found that McDonald's hamburgers are less painful for me than other brands of hamburger. I am not sure why - I'm guessing it's because there's less actual beef and more filler? A 100% quality beef hamburger would do way worse things to me than a cheap icky McD's hamburger would.
And Taco Bell's "meat" is apparently not, as I can eat their beef tacos and not experience a stomachache like I would with a hamburger. I still don't feel great eating Taco Bell, but I don't get one of those specific "I just ate beef" kind of episodes. So yeah, in my experience, eating garbage that's barely meat actually sits better with me than eating quality beef. Go figure!
