The frequency of keratin lash lifts depends on the individual’s natural lash growth cycle and the desired maintenance schedule. A keratin lash lift can last anywhere from 4-8 weeks, depending on the person’s natural lash growth and care. Some people may get a touch-up treatment every 4-6 weeks to maintain the lift, while others may wait longer before getting a new treatment. It’s important to follow the recommended aftercare instructions and avoid using oil-based products or rubbing or pulling at the lashes to help the treatment last if possible. It’s also a good idea to consult a trained and experienced professional to determine the best frequency for your individual needs and goals.