Which nutrient is essential for tissue growth and repair?

Protein is essential for tissue growth and repair because it is composed of amino acids, which are the building blocks of body tissues. These amino acids play a crucial role in the formation of new cells, as well as the repair of damaged tissues. When tissues are injured or need to be rebuilt, the body requires an adequate supply of protein to synthesize new proteins that support muscle growth, skin regeneration, and other critical functions.

In contrast, carbohydrates primarily serve as a source of energy for the body, while fats are important for energy storage and the absorption of certain vitamins. Vitamins support various biochemical processes in the body but do not directly contribute to the building or repairing of tissues. Therefore, while all these nutrients are important for overall health, protein stands out as the key nutrient specifically required for tissue growth and repair.