Is it your first time using it and is it early on in dosing? Some have reported diarrhea while using yellow gold (also on AP sometimes). Although I have not used YG, I had similar issues with Anabolic Pump which is very similar, but it subsided within 2 days (actually this happened the first time I used AP, and after an extended break ~ both times it was resolved within 2 days). It should subside within 3-4 days of initial use assuming dosing scheme and food choices are up to par.