The most abundant protein found in the human body is collagen. It serves as a critical component in various connective tissues, including skin, tendons, ligaments, and cartilage. Collagen provides strength, support, and structure throughout the body, playing a vital role in maintaining skin elasticity and joint health. Its production naturally decreases with age, which is why many supplements target collagen replenishment to support skin health and improve joint function. Overall, collagen is essential for tissue repair, mobility, and overall structural integrity.