Which nutrient is primarily responsible for building and repairing muscle tissue?

Proteins are primarily responsible for building and repairing muscle tissue due to their role as the building blocks of the body's tissues. When you engage in activities like strength training or physical exercise, muscle fibers undergo stress and sustain minor injuries. Proteins provide the necessary amino acids that are crucial for repairing these fibers, promoting muscle growth, and maintaining muscle mass. Additionally, proteins play a vital role in various bodily functions, including enzyme production, hormone regulation, and immune response, further underscoring their significance in overall health and fitness.

Carbohydrates mainly serve as a primary energy source for the body, while fats are essential for long-term energy storage and supporting cellular functions. Minerals contribute to various physiological processes, including bone health and nerve function, but they don't play a direct role in the muscle-building and repair process like proteins do.