What are the best sources of protein? We asked nutrition experts to share the animal- and plant-based sources of protein they recommend. High-protein foods, like edamame, lentils, egg whites, canned tuna and chicken breast, can help you build muscle and reduce the risk of heart disease. Protein is essential for cell structure, immune function, and hormone synthesis, and eating enough protein can help keep you feeling full and satisfied. High protein foods include chicken and. Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. People generally say “protein” (or “dietary protein”) when talking about nutrition and “proteins” when discussing the science of how the individual molecules work within your body. Each protein contains one or more polypeptide chain. The chemical properties and order of the amino acids determines the structure and function of the polypeptide. These can include various fruits and vegetables, dairy products, meat, seeds, and more. Eating foods high in protein has many benefits, including muscle building and feeling fuller after eating. Proteins are large molecules made up of chains of amino acids that are important for cell function, tissue structure, and body regulation. Most people in the U.S. consume more protein than needed, with dietary guidelines suggesting about 6.5 ounces per day for men and about 5 ounces for women. Protein is an essential macronutrient, but not all food sources of protein are created equal, and you may not need as much as you think. Learn the basics about protein and shaping your diet with healthy protein foods. Your body needs protein to stay healthy and work the way it should. More than 10,000 types are found in everything from your organs to your muscles and tissues to your bones, skin, and hair.