Protein is vital because it serves as the body's primary building material for tissues, muscles, bones, and cells. It is essential for countless bodily functions, including repairing damaged cells , making new ones, and supporting a strong immune system. Proteins also play a key role in producing enzymes, hormones , and other necessary molecules, while also aiding in digestion, transporting nutrients, and regulating fluid balance . Key functions of protein Building and repairing tissues : Proteins are the "building blocks" for muscles, skin, hair, nails, and bones. They are crucial for growth and the repair of damaged cells. Immune system support: The immune system relies on proteins to create antibodies and other components that fight off bacteria and viruses. Enzyme and hormone production: Proteins are essential for creating enzymes that drive metabolic reactions and hormones that act as chemical messengers throughout the body. Nutrient transport and storage: Prot...