Lentils contain high levels of proteins, including the essential amino acids isoleucine and lysine, and lentils are an essential source of inexpensive protein in many parts of the world for those who adhere to a vegetarian diet or cannot afford meat. Lentils are also rich in VB and folic acid which can promote the growth and metabolism of human muscle, bone and nerve function; with a large number of cellulose, lentils also can coordinate and stimulate peristalsis and improve gastrointestinal function. They are natural health products of hypertension, hyperlipidemia and other diseases in elderly patients.