Well it is true if you exercise after you intake those kind of berries.. it takes time. It helps you cleanse your organs and gives you lots of vitimans and minerals then any other berries can. It burns approx 20% more then the next berries which is the blue berries. I have been drinking them and taking the acai berries cleanse formulas and I must warn you.. if you have already ate lots of toxins, you will visit the toilet more then you expect until it is all cleaned out. For some people, there will be some food changes if you want to avoid the toilet... 
I have been there for about two weeks... lost few pounds then I went back on my other plans and lost more... that is one key to my solution to change my foods. Remember to intake those berries half hour before you exercise, and put in little more effort in the workout then you ususally do.. you will feel the burn.
One more thing for people who lift weighs have to remember if they bulk up with the muscles, they weigh more then the fat does... I have it up in my blog. If you have both.. you weigh lot more heavier.
