Collagen is often mentioned in conversations about skin, joints and healthy ageing, but it is first and foremost a fundamental building block of the body. This article gives a general, educational overview of what collagen is and the structural role it plays in the body’s connective tissues.
What Is Collagen?
Collagen is described as the most abundant structural protein in the human body, providing tensile strength and support through a resilient framework within tissues (Rahimi & Launico, 2026). It is found throughout the body, including in skin, bone, tendons, ligaments and cartilage. There are many different types of collagen, each suited to the tissue it helps to form.
Collagen and Connective Tissue
Connective tissues rely on collagen for much of their structure. Its characteristic triple-helix arrangement gives these tissues the ability to withstand mechanical stress while maintaining their shape (Rahimi & Launico, 2026). This is part of why collagen is so central to tissues that bear load or resist stretching, such as tendons and ligaments.
Collagen in Cartilage and Joints
Within joints, collagen is a key component of articular cartilage, the smooth tissue lining the ends of bones. Alongside other matrix components, collagen contributes to the framework that gives cartilage its resilience (Slater & Slater, 2022). This structural role is part of why collagen is discussed so often in the context of joint health.
Why Collagen Attracts Interest
Because collagen is so widespread and so central to structure, it is a natural focus of interest in discussions about tissue health. It is worth noting that this is a broad and evolving area, and general information about collagen’s role is not a description of any particular treatment or product.
Conclusion
Collagen is a fundamental structural protein that underpins much of the body’s connective tissue, including the cartilage within joints. This overview is general in nature; for questions about your own health, please speak with a qualified healthcare provider.
References
- Slater, G., & Slater, T. (2022). Articular cartilage — a literature review. Journal of Regenerative Biology and Medicine. https://www.researchgate.net/publication/360456582_Articular_Cartilage_-A_Literature_Review
- Rahimi, N., & Launico, M. V. (2026). Biochemistry, collagen synthesis. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK507709/
Disclaimer: This blog is for informational purposes only and should not be considered medical advice. Please consult with your healthcare provider for any questions or concerns regarding your health.