Originally Posted by
anga
https://en.wikipedia.org/wiki/Protein_poisoning
You don't want to eat only protein. In fact, it is not easy to eat only protein to make up 3000 calories; that's about 750 grams of protein.
Use lean meats + vegetable oils, fatty fish etc, as much vegetables and greens and fruit you can tolerate. Work with a nutritionist/dietitian.
Please don't consume vegetable oils. Please take some time to look into more recent health and dietary info associated with vegetable oils.