Hyaluronic acid is a substance known for its skin plumping and moisturizing properties and is frequently used in filler applications. It is considered an ideal filler because it retains 1000 times its volume of water and stays in place for a long time without losing its shape. It helps lips look more moist. Hyaluronic acid, which increases the volume of lips and provides a fuller appearance, does not cause an allergic reaction as it is one of the body’s natural building blocks. Although its side effects are minimal, it is extremely important that the application is performed by experts and experienced people in the field.