Juvederm is typically suggested as the longest lasting lip filler. Restylane may also be a good option. Both Juvederm and Restylane are hyaluronic acid fillers. HA fillers are the most popular choice for lip augmentation. They are temporary and tend to be absorbed by the body over time. Some versions, like Juvederm Volbella, may last up to 12 months or longer. If your lips are settling quickly after the Juvederm, there may be some other reasons for this. Individuals with a faster metabolism may break down hyaluronic acid (HA) fillers more quickly, leading to shorter-lasting results. The body naturally metabolizes HA, so those with higher metabolic rates might notice the filler dissolving faster. If the filler is injected too superficially, it might be more prone to breaking down quickly. Proper technique and depth are crucial for maximizing the longevity of the filler. The lips are one of the most mobile areas of the face, and constant movement can cause the filler to break down faster. This includes talking, eating, and other facial expressions that involve the lips. Hyaluronic acid fillers rely on moisture to maintain volume. If you are dehydrated, the filler may not last as long. Factors like smoking, excessive sun exposure, or vigorous exercise can potentially accelerate the breakdown of fillers. I would recommend going with Juvederm Voluma as it is intended to me more long lasting and ensure that you are taking the proper aftercare steps, staying hydrated, and reducing sun exposure.