Which macronutrient is essential for building and repairing tissues?

The macronutrient that is essential for building and repairing tissues is proteins. Proteins are composed of amino acids, which are the building blocks of tissues such as muscles, skin, and organs. When the body needs to create new cells or repair damaged ones, proteins play a crucial role in this process. They are involved in the development and repair of all body tissues, and they are necessary for the production of enzymes and hormones that regulate various bodily functions.

In contrast, carbohydrates primarily serve as a source of energy for the body, while fats also provide energy and aid in the absorption of fat-soluble vitamins. Vitamins, on the other hand, are organic compounds that play various roles in bodily functions but do not directly contribute to tissue building or repair. Thus, the unique role of proteins in the structure and restoration of tissues makes them the essential macronutrient for these processes.