I had my gb removed about 6 years ago. For those who are experiencing extreme weight loss and food going straight through, I would talk to your dr about Dumping Syndrome. I was diagnosed with this after losing about 40 lbs in a month after my surgery. The dr gave me medication (it’s been too long but i believe the medication was called cholestyramine) This med helped stop the immediate diarrhea and vomiting after meals. Unfortunately, once I stopped losing excessive weight, I started gaining excessive weight and have not found a solution for that.