Take it from an Exercise Physiologist and author that has worked in the weight-loss industry for many years... there are NO SHORTCUTS that will give you lasting success. Stimulants, of which this product has plenty, artificially speed up the metabolism and supress hunger. While you will likely see short term weight loss benefits from this product, unfortunately such a product will eventually lead to a decrease in your natural metabolism causing you to eventually be at a normal metabolic rate even while taking the supplement (this is the tolerance/addiction). At this point, the pills don't work as well without taking larger doses in a never ending cycle of increased tolerance, addiction, and diminishing results. Not only will this leave you with a severely stunted metabolism in the end, such supplements increase the risk of heart attacks, psychological problems, anger, and depression. For lasting success, speed up your metabolism with exercise and a balanced diet that limits simple sugars and unhealthy fats (not the healthy ones), and maximizes high nutrient foods. Supplements that help to supplement your diet are recommeded, but supplements that help to keep you from consuming a healthy diet need to be avoided. Good luck and be healthy!