Protein metabolism test

Protein foods such as lean meat and eggs that people eat are broken down into amino acids by the action of proteases in the gastrointestinal tract. Amino acid molecules are small and can be absorbed into the blood through the gastrointestinal mucosa and into the liver. Liver cells can synthesize amino acids into various proteins and enzymes needed by the human body, such as albumin and prothrombin in the body. The liver has strong protein synthesis capabilities. Except for immunoglobulins, almost all plasma proteins are made by the liver. Since plasma proteins can be used for the regeneration of various tissue proteins in the body, the role of the liver in synthesizing plasma proteins is of great significance for maintaining protein metabolism in the body. The liver metabolizes ammonia produced by amino acid metabolism into urea, which is excreted by the kidneys. Therefore, plasma protein decreases and blood ammonia can increase during liver disease.