Dietary proteins are essential nutrients made up of amino acids, which are the building blocks of the body. They play a crucial role in growth, repair, and maintenance of tissues, as well as in the production of enzymes and hormones. Proteins can be found in various food sources, including meat, fish, dairy products, beans, and nuts. There are two main types of dietary proteins: complete and incomplete. Complete proteins contain all nine essential amino acids that the body cannot produce on its own, while incomplete proteins lack one or more of these amino acids. Combining different food sources, such as rice and beans, can help ensure a balanced intake of all essential amino acids.