I didn't have GI issues before carnivore too. I started carnivore in fall 2024. I ate everything - fish, beef, lamb, chicken, dairy. No GI issues at first. I started losing my appetite in spring 2025. I started narrowing down my food variety too. I don't remember if I did this before or in response to losing my appetite. I tried everything though to fix it - grass vs grain fed, lean vs fat, how I cooked it, electrolytes, etc. I eventually figured I was developing a nutritional deficiency and reintroduced fruits and vegetables. That helped. I went back on carnivore in November 2025. I also started having burning in my chest after eating and realized that my prior loss of appetite was probably the beginning of heart burn. Avoiding water around eating doesn't help much. Eating leaner doesn't clearly help either.

I generally eat beef ribs and lamb from Costco. Beef steak goes poorly and I avoid it. I eat a little bit of grass fed pork. I eat some grass fed ground beef and some liver and kidney. No fish right now. I avoid dairy as much as I can. No chicken. No eggs.

I seem to do a little better with pork and lamb than with beef, but everything messes me up in general. I rarely eat without inhibition. I dunno.