What main role does collagen play in the human body?

Collagen plays a crucial role in the human body as the main structural protein found in connective tissues. It forms a significant component of various tissues, including skin, tendons, ligaments, and cartilage, providing strength and support. Collagen fibers create a framework that helps maintain the shape and integrity of these structures, contributing to their durability and resilience under stress.

While collagen does play a role in maintaining joint health, its primary function is not to improve flexibility but rather to provide structure and strength. It also does not serve as a source of energy for muscle contractions or directly enhance blood flow; these functions are managed by other proteins and systems in the body. Overall, the unique properties of collagen make it essential for the structural integrity of a vast array of tissues, underscoring its importance as a foundational element in the body's framework.