NCSF Sport Nutrition Specialist Certification (SNS) Practice Test 2026 – The All-in-One Resource to Master Your Certification!

Proteins are primarily responsible for the repair and growth of tissues in the body. They are composed of amino acids, which serve as the building blocks for various bodily structures including muscles, skin, organs, and even enzymes and hormones. When the body undergoes stress from exercise or injury, these proteins are essential for the recovery process, enabling the repair of damaged tissues and facilitating muscle growth. This makes proteins crucial for athletes and active individuals who need to rebuild and enhance their muscle mass and overall tissue health.

In contrast, carbohydrates primarily serve as a source of energy for bodily functions and physical activity. Fats are important for energy storage and the absorption of certain vitamins, but they do not play a direct role in tissue repair and growth in the same way that proteins do. Vitamins support various biochemical processes in the body and are essential for overall health, but they are not structural components necessary for growth and repair. Therefore, proteins unequivocally hold the primary responsibility for tissue repair and growth.