What is the primary function of protein in the human body?

The primary function of protein in the human body is building and repairing tissues. Proteins are made up of amino acids, which are the building blocks of cells and are crucial for the growth and maintenance of muscle, skin, organs, and other vital tissues. When the body undergoes stress, injury, or regular wear and tear, proteins play a critical role in repairing damaged tissues and facilitating healing processes. Additionally, proteins are essential for the production of enzymes and hormones, both of which are vital for carrying out various bodily functions.

While proteins can provide energy, this is not their main role; the body primarily uses carbohydrates and fats for energy. Regulating temperature is more closely associated with the functions of the skin and other systems, rather than protein specifically. As for absorbing vitamins, although certain proteins can assist in the transport of vitamins, their main function remains focused on structural and functional support in the body. This reinforces the idea that protein's key role is in tissue building and repair.