Which nutrient is primarily responsible for building and repairing tissues?

The nutrient primarily responsible for building and repairing tissues is proteins. Proteins are made up of amino acids, which are often referred to as the building blocks of the body. These amino acids play a crucial role in various biological processes, including the growth and repair of muscles, organs, skin, and other tissues.

In addition to serving as structural components, proteins are involved in the production of enzymes and hormones that regulate numerous physiological functions. During periods of growth, recovery from injury, or muscle repair, the body's need for protein increases significantly, highlighting its importance in tissue health and maintenance.

While fats, carbohydrates, and vitamins are essential for various bodily functions, they do not play a direct role in the building and repairing of tissues in the same way that proteins do. Fats are primarily used for energy storage and insulation, carbohydrates serve mainly as a quick source of energy, and vitamins are involved in a range of metabolic processes but are not structural components needed for tissue repair.