Which protein is essential for giving the skin its strength and structure?

Collagen is the protein that plays a critical role in providing strength and structure to the skin. It is the most abundant protein in the human body, forming the main component of connective tissues, including the dermis of the skin. Collagen fibers are essential for maintaining the skin's firmness, elasticity, and overall structural integrity. As we age, collagen production decreases, leading to signs of aging such as wrinkles and sagging skin.

While keratin is also a protein found in the skin, it primarily contributes to the formation of the outermost layer and provides protection rather than structural strength. Elastin is another important protein that allows skin to retain its elasticity and stretch; however, it works in tandem with collagen, rather than being the primary support structure. Actin is a protein that plays a significant role in muscle contraction and cell movement but does not directly affect the skin’s structural integrity. Therefore, collagen is the key protein responsible for the support and resilience of the skin.