When I eat, I have a reaction about 10 - 15 minutes later. I feel like I have the flu, feverish, weak, upset stomach, and sometimes have an awful headache. I have this reaction almost every time I eat. It does not appear to be in conjunction with any specific type of food. I have had complete blood work done where my liver function was a little high, and then more extensive bloodwork done for liver function which all tested normal. My thyroid tested normal as well. I have had ultrasounds done of my liver, pancreas and gall bladder. I had a test of my gallbladder where they faked a hunger/food response - it was normal. I had a colonoscopy done - normal. I am trying a gastroenterologist - can you advise me what to ask for? Possibly an endoscopy? Also, do I display any symptoms of an endocrine disorder? This has been going on for two months and no one is any closer to identifying the problem. Please, can you help me?