I started about 3 months ago and I've lost over 25 lbs. No side effects at all, 400 mg a day three caplets. take them in the morning before breakfast. Lightened my diet, but it's a good appetite suppressant. Walmart brand with Svetol and Yerba Mate. Maybe different brands have different effects? Tried it without Svetol and didn't seen to work.
When I started taking this GCB extract, I weighed in at 198 lbs. In four weeks, I lost 6 lbs without changing anything. I have to say, however, that I have since modified my diet to continue this weight loss so I'm watching what I eat and work out an hour a day. I will check in again to update my results. I have read a lot of the reviews and all I can say that not everything works for everyone. I used to use something that you sprinkle on foods before you eat it and gave me severe stomach cramps. I am using the Dietworks GCB extract with svetol.