In youth, the body constantly produces and replenishes its hyaluronic acid levels. However, as it ages—or is exposed to the sun, smoking and environmental damage—the body cannot maintain this process. As hyaluronic acid levels deplete, moisture and structure are lost, causing the skin to dry out and get looser, forming fine lines and wrinkles. However, when Teosyal Global Action is injected into the dermis, lost hyaluronic acid is replaced. This refreshes and plumps the skin, making it tighter, smoother, and more youthful-looking.