One of the key benefits of lip augmentation is its long-lasting results, providing patients with a more youthful, refreshed appearance that lasts for months. The longevity of lip augmentation results depends on several factors, including the type of filler used, the patient's age and skin quality, and the skill of the practitioner. Hyaluronic acid fillers, which are the most commonly used type of filler for lip augmentation, typically last 6 to 12 months before the body naturally breaks down and absorbs the filler.   While the results of lip augmentation are long-lasting, they are not permanent. Over time, the lips will slowly return to their natural shape and volume, and patients may choose to repeat the treatment to maintain their desired results.