I was really skeptical about this product. I have been using it for about 4 weeks and I feel it WORKS! I am 51 year old male, that was getting grumpy all the time for no real reason. I take this before bed and I wake in the morning without the grumpy man. I feel a lot clearer and rested when I wake up. I have also started to see less fat around my mid section. To me it is a definite difference.