Elastin is a key protein of the extracellular matrix. It is highly elastic and present in connective tissue allowing many tissues in the body to resume their shape after stretching or contracting. Elastin helps skin to return to its original position when it is poked or pinched.
Your body produces elastin throughout childhood but stops producing elastin after puberty. Approximately 10% of the elastin in the body is lost over a lifetime, resulting in wrinkles and sagging skin.
The loss of elastin in the skin is caused by both intrinsic and extrinsic aging.