Proteins are nutrients that the body needs to produce important parts of the body, such as muscles, hormones, tissues, skin and hair. In addition, they were the neurotransmitters, which are responsible for transmitting the nerve impulses that form thoughts and the physical commands for the body to move. They are important nutrients for maintaining and increasing muscle mass, because for muscles to grow, it is necessary to have, in addition to exercising regularly. The body’s antibodies and defense cells are made of proteins, and without an adequate intake of this nutrient, the immune system weakens and the body becomes more susceptible to diseases and infections. Proteins are responsible for the formation of collagen, the substance that gives the skin firmness and prevents wrinkles and expression lines. In addition, keratin, the main ingredient in hair, is also a protein, which is why healthy hair needs this nutrient.