i only had it in the top middle area because i didnt want any adverse side effects by doing more. it was more of a test, and it seemed to work. it stopped peeling for 3 months, there may have been a slight peel here or there but nothing noticable and very rare, ive actually been thinking about doing it again because i am wiondering if it was just the humidity and sun that helped or the actualy injection. i am going to try again in september because now its summer and that wouldnt help