Over the years I have tried several products claiming to increase energy levels, drive, mood... none of them delivered. I decided to give this one a try and it really works. Thanks for producing a product that does what it says it will. I will be purchasing more!!! I'm in my 50's and my energy has definietly taken a hit. I was surprised that minutes after taking 3 capsules I could feel a difference in my energy. I also do triathlon and feel like this helps me raise testerone levels which will increase my performance. Love this and their customer service. you are aweseme!!