When we think of youthful skin, we often think of a taut, line-free complexion, accompanied by volumised, full-looking cheeks. However, the older we get, the harder this can be to maintain. This is because our skin requires collagen and elastin to stay healthy. When we are young, our bodies are capable of producing plenty of these proteins, but as we age, becomes less efficient at doing so. Without collagen and elastin, the connective tissues within the skin weaken, causing skin to begin to sag. The appearance of sunken cheeks can dramatically age the face, making patents look gaunt and haggard.