Fillers are hyaluronic acid based. The most popular brands include: Juvederm, Restylane, Revanessa, RHA, and Radiesse. It is used to correct volume loss, correct asymmetries, add new volume, soften lines and wrinkles. Fillers have anti-aging, preventative, and facial balancing benefits. Fillers are injected into the skin and results are immediate. There is typically a period of bruising. Fillers can last anywhere between 9-18 months.