Proteins are amino acids with different structures that play an essential role in metabolism. Protein is the essential nutrient that can provide energy and nutrients to the body. Meat, fish, eggs, pulses, lentils, beans, nuts, and other protein sources can be included in the diet. Animal meat is rich in proteins such as meat, milk, eggs, poultry, fish, etc., whereas plant proteins are rich in protein like soybeans, legumes, grains, and fruits. Vegetable proteins such as maize grain, soybean, maize meal, rice, oats, etc., provide energy and nutrients.