Absolutely nothing, if you only eat a few ounces. But a lot of places will server you a 12 oz ribeye steak which has 900 calories all by itself. Add on a side of french fries and a sugary beverage and you get a days worth of calories in a single sitting.
When you are on a GLP medication, commonly your digestion slows and will make you really prone to constipation and acid reflux. I've learned to eat just 3-6 ozs when I do steak, and generally opt for the veggies instead of the potatoes now. Feel much better in the morning.
Yeah I think the fries and sugary beverage would be contributing to the “crazy stomach pain” a lot more than the steak. But the person I’m replying to made no mention of those things..
A 12oz ribeye is a pretty generous serving; it's not something that sneaks up on you.
The surprising thing for me, having settled into a ~1400kcal budget, is how tricky it is to hit protein goals. You go into this thinking it'll be like going low-carb, you'll just eat a lot of beef, but the fun cuts are not efficient protein delivery vehicles. Hitting the kcal budget is effortless; getting the protein in, not so much.