Protein foods are important sources of amino acids. Some amino acid cannot be synthesized in the body and must be supplied from food called "essential amino acids", which has itself said "non-essential amino acids". When kidney dysfunction, protein supplies as well as reduce and get enough essential amino acids must be guaranteed. Non-essential amino acids can be synthesized by the body itself, while reducing protein intake, and in the synthesis of non-essential amino acids, with some nitrogen-containing substances, reducing the generation of waste, protect kidney function.
Thus, when you select protein foods, containing more of the essential amino acids and non-essential amino acid-containing foods as little as possible. These foods are also known as quality protein foods, such as fish, eggs, lean meats, dairy, etc. Plant proteins of pulses and derived products, generally with non-essential amino acids, so when kidney disease patients develop renal insufficiency, it is best to eat or not to eat this kind of food.