I am going on 15 yrs and I fought with gastroparesis constantly for the first 8 yrs. I started taking a medication that took care of it and the constipation all at once. I also had to figure out the dumping issue and I do know that how much you eat plays a huge part, 1 bite to many and your down for awhile. Also certain foods or ingredient can set it off...pay attention to everything and learn as you go.