Why do humans need protein?

Protein is essential for building, repairing, and maintaining tissues in the human body. It is made up of amino acids, which are the building blocks of muscles, skin, hair, and organs. Protein also plays a crucial role in producing enzymes, hormones, and antibodies. It provides energy when carbohydrates and fats are insufficient in the diet. High-protein foods include meat, fish, eggs, dairy, legumes, and nuts. A balanced intake of protein is vital for overall health, growth, and development.