Which nutrient is primarily responsible for muscle repair and growth?

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The nutrient that is primarily responsible for muscle repair and growth is protein. Protein is made up of amino acids, which are the building blocks essential for the synthesis of new muscle tissue. During exercise, especially strength training, muscle fibers experience stress and damage, and protein plays a crucial role in repairing that damage and promoting muscle hypertrophy, or growth.

After a workout, the body triggers a process called muscle protein synthesis, where amino acids are utilized to repair the damaged muscle fibers. Consuming adequate protein supports this process and enhances recovery, making it vital for anyone engaged in regular physical activity, particularly those focused on building muscle mass.

In contrast, carbohydrates primarily serve as a source of energy during exercise, and fats provide energy as well but are not directly involved in muscle repair. Vitamins support various physiological functions and may aid overall health but do not contribute directly to muscle growth and repair like protein does. Thus, protein stands out as the key nutrient for muscle recovery and growth.

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