That's really odd I've been on 850mg a day for a little over a year now idk how long you stuck to it but you do build a tolerance to all the side effects. I still get a mild appetite suppressant effect but other then that I feel perfectly fine. The first month I definitely had some GI issues, diarrhea, stomach cramps, all the not fun stuff. But Idk I endured it for the longevity Blood glucose benefits. I'll double my dose if I'm carbing up and haven't had any negatives maybe you just didn't stick to it long enough. What would you feel while on it? Light headed/weak or something else?