The duration really can vary quite a bit from person to person! I've found that several factors seem to influence how long the effects last. People who are more physically active, particularly those who do a lot of cardio or high-intensity workouts, tend to metabolize the treatment faster. Age can play a role too - younger people often process it more quickly. The area treated also matters; I've noticed that forehead treatments seem to last a bit longer for me than the area around my eyes. Your metabolism, the strength of your facial muscles, and even genetics can all impact the timeline.