Dermal fillers are used for cosmetic purposes and are meant to give volume and fullness to an individual's skin. When used properly, these products diminish the most common signs of aging such as facial wrinkles and skin folds. Most women use these products to make themselves look younger. If you're looking for a dermal filler to combat signs of aging, your mid-20s is often a good time to start. Your body starts to lose bone and collagen around age 26, so it's a good time to begin maintenance injections. By starting early, you'll use require less product than if you wait until your mid-50s.