Picture of Wrinkles
Wrinkles are a normal part of the aging process. Skin cells turn over more slowly as we age, and the dermis (inner layer) of the skin starts to become thinner. Structural proteins in the skin, elastin and collagen, begin to break down. Oil production decreases, leading to increased dryness. The skin becomes less elastic. All these factors lead to skin aging and wrinkles.
Text Reference: DermatoEndocrinology: "Skin Anti-Aging Strategies"