As you age, the amount of hyaluronic acid and collagen in your skin decreases. These are substances that are very important in maintaining moisture levels and providing firmness to your skin. As a result, the skin becomes more dehydrated and less firm. Wrinkles and lines are formed more quickly. These get deeper with age and can give a fatigued facial expression. A treatment with fillers can combat these aspects and give you a more rested and youthful look.