Protein is an essential building block in the body. It is digested and converted to smaller units called amino acids which help to form important cellular structures and they are vital for healthy liver maintenance. Experts suggest that the intake of high-quality protein food for healthy individuals should not less than 90 grams per day. For people who have liver damage and a weakened body should take more essential amino acids from food or supplement. One-cup (243-gram) serving of egg whites gives 26 grams of protein. Some high protein foods include: chicken breast, fish, lean meat, legume and egg whites.