What is a primary function of proteins in the body?

Proteins play a crucial role in the body's structure and function primarily by building and repairing tissues. They are made up of amino acids, which are the building blocks necessary for the formation of muscle, skin, organs, and other bodily components. When the body undergoes growth, repair, or recovery from injury, proteins are essential for the synthesis of new tissue and the maintenance of existing tissues.

In addition to structural functions, proteins are also involved in various metabolic processes, including enzyme activity, hormone production, and immune response. Their importance in these functions highlights why they are often regarded as vital macronutrients necessary for overall health.

While proteins are not primarily focused on providing immediate energy or storing fats, they can serve as an energy source when carbohydrates and fats are not available. However, this is not their main role. Neither are proteins responsible for storing fats or being the main source of vitamins, which are functions attributed to other macronutrients and micronutrients.