Like any supplement, repeated use of GenF20 Plus provides the best results. Many GenF20 Plus ingredients are studied based on their ability to increase serum IGF-1 or GH itself within 90 minutes of consumption, but unless you have a multimillion-dollar lab in your basement, you might need to wait longer to know if it’s working. If you already eat a healthy diet and exercise regularly, you may start to see effects on your muscles and weight within a couple of weeks. If you don’t exercise much but start going to the gym more once you begin taking GenF20 Plus, you may mistake the general benefits of a regular workout routine for the activity of the supplement. The clinical trial of GenF20 Plus showed that patients over age 40 started seeing increased levels of IGF-1 within 12 weeks.Sonawane, N., Kale, V., Erande, S., Chaudhary, J. (2015). Effect of GenF20 Plus on Serum IGF-1 Levels in Healthy Adults: A Randomized Controlled Study. Open Access Journal of Clinical Trials, 2015(7), 35-42.