Which nutrient plays a crucial role in building and repairing body tissues?

Proteins are essential for building and repairing body tissues due to their fundamental role as the body’s structural components. They are made up of amino acids, which are the building blocks of muscle, skin, organs, and blood, among other tissues. When the body undergoes growth, healing, or muscle building, proteins provide the necessary materials to form new cells and repair damaged ones.

In contrast, carbohydrates primarily serve as a quick source of energy, while fats are important for long-term energy storage and cell structure but do not directly contribute to tissue construction. Vitamins are vital for various bodily functions, including supporting metabolic processes, but they do not fulfill the role of building tissues directly. Thus, proteins stand out as the key nutrient responsible for the maintenance and growth of body structures.