Milady Esthetics State Board Complete Practice Test 2025

The primary cause of wrinkles is the damage and loss of elastin, which is a crucial protein that helps maintain the skin's elasticity and firmness. As we age, the production of elastin decreases, leading to the skin becoming less flexible and more prone to sagging and the formation of wrinkles. Elastin fibers enable the skin to stretch and return to its original shape, much like a rubber band. When elastin is compromised, the skin loses its ability to bounce back, resulting in the visible signs of aging such as wrinkles and fine lines.

Collagen is also important in maintaining the skin's structure and firmness, but the specific role of elastin is to provide that elasticity necessary for youthful skin appearance. Keratins are structural proteins primarily found in hair, skin, and nails, while hyaluronic acid is a substance that retains moisture in the skin. None of these play the direct role that elastin does in contributing to the skin's ability to resist sagging and wrinkle formation. Thus, understanding the role of elastin is key to grasping the mechanisms behind the development of wrinkles as a result of skin aging.