Filler is made of Hyaluronic Acid. A water loving molecule that acts like a sponge and fills up with water upon injection filling out fine lines/wrinkles and plumping lips. Young skin is moisturized with this hyaluronic acid and naturally occurring sugar. It keeps our skin hydrated via absorption of the water. As we age, this volume of hyaluronic acid decreases and fine lines begin to appear that will eventually turn into wrinkles. In the lips, this causes thinning, loss of fullness, volume and definition. We can also develop vertical or marionette lines around the mouth that cause your mouth to droop, giving you an unhappy appearance. Nasolabial folds can also become deeper due to age-ing along with other factors such as sun exposure, lifestyle, muscle imbalances and so on.