I bought this product as a last attempt to lose weight before a special event. The only thing it did for me was make me jittery and keep me from being able to sleep. I would wake up throughout the night and feel restless. Not only did I not lose weight but I felt bloated and fat. I read the ingredients on the bottle and it contained a lot of caffeine and the directions said to not take at night. So I began taking in the morning about thirty minutes before breakfast and lunch and still had trouble sleeping. The caffeine gave me an energy boost as the product promised but I could have done that on my own. This product is not worth the money or time. I will not ever try this product again and will not ever recommend to anyone else. Effectiveness I did not lose any weight at all. Side Effects The amount of caffeine that this product has caused me to be jittery and light headed. My heart fluttered which was scary and made me stop taking this immediately.