Protein is one of the organic compounds, consisting of a single chain. It can consist of a series of amino acid chains. These chains bind bonds called peptide ligaments, and protein is one of the compounds that is very important to the health of the human body because it is one of the basic constituents of tissues Cells, and regulates the body's various functions such as hormones and enzymes. The body gets proteins from food and food, and when these proteins enter the body, the body's adequate amount of protein is converted to proteins that serve it, while proteins that exceed the body's need are converted into energy sources of the body such as glucose. Proteins divide proteins in nature into two main parts: the source of proteins according to the source and is divided into two: animal proteins and the human gets these proteins from animal sources such as chickens, eggs, red meat, fish, and this type of protein is the best since it is able To supply the body with many amino acids. Plant proteins This type of protein gets the body from plant foods such as wheat, rice, maize, beans, and this type of protein does not contain important amino acids for the body. By dissolving simple proteins and this type of protein dissolves in water, this type of protein can form amino acids of it well, and this type of protein is available significantly in corn oil, and eggs. Complex proteins These proteins are usually made up of organic and inorganic parts with protein molecules. These proteins melt by heat, and this protein is broken down into other parts of amino acids. The protein forms in the human body lipoprotein. This protein is present in lymph and in the blood. This protein is often associated with fat and fat inside the blood, such as cholesterol. High-density lipoprotein This protein is very important in the body as it protects the heart from coronary disease, because of the ability of this protein to rid the cells and tissues of cholesterol. Low-density lipoprotein (LDPE). The protein in the body transfers triglycerides to cells and tissues so cells and tissues produce energy for the body, or store these triglycerides in fat. This protein is found in the blood of the pregnant woman only. This protein is produced by the fetus in the salivary fluid, and the increase or decrease of this protein in the blood is a sign of the fetus suffering from deformation or defect. If this protein exists in men Or in non-pregnant women at high rates, this is evidence of their suffering from certain diseases of cancer in the liver or testicles or in the ovaries, and these cancers are identified by their response to treatment through the work of testing the level of this protein