Which nutrient is primarily responsible for growth and repair of body tissues?

Proteins are essential nutrients primarily responsible for the growth and repair of body tissues. They are made up of amino acids, which are the building blocks of tissues, including muscles, organs, and skin. When the body undergoes growth, injury repair, or stress, proteins are crucial for the synthesis of new cells and the replacement of damaged ones.

While fats and carbohydrates also play significant roles in providing energy and supporting various bodily functions, they do not have the same primary role in tissue repair and growth as proteins do. Minerals are important for many biological processes, including enzyme function and bone health, but they do not provide the structural components required for building and repairing tissues in the way that proteins do. Thus, proteins stand out as the key nutrient for these vital processes.