Which protein contributes to the pliability of the skin?

Elastin is the protein that plays a critical role in the pliability and elasticity of the skin. This unique protein allows the skin to stretch and return to its original shape, which is essential for maintaining youthful and resilient skin. As we age, the production of elastin decreases, leading to a loss of skin elasticity and firmness, resulting in sagging and wrinkles.

While collagen is also vital for skin structure and provides strength, it does not inherently contribute to pliability. Keratin, on the other hand, is primarily found in hair and nails and serves a protective function rather than influencing skin elasticity. Fibronectin is involved in cell adhesion and tissue repair, but it does not directly affect the skin's pliability in the same way elastin does. Thus, elastin is the key protein associated with the skin's ability to stretch and flex.