ProLon users report dramatic shifts in their relationship to food after even just 1 cycle, as well as immediate weight loss and decrease in waist circumference. So even just one cycle of ProLon is worthwhile, and gives you a chance to go through the life-changing experience of fasting with food. However, if you want to derive the maximal benefit from ProLon, repeated cycles are recommended. The clinical studies we have completed to date show that multiple consecutive cycles support metabolic health, longevity, healthy aging, and more. In the trials, weight loss from just 1 cycle of ProLon was approximately 5lbs and waist circumference was reduced by 1 inch, but results were more significant and were better retained after 3 cycles.