 [ Symptoms ] i almost passed out last night 3 separate times each while doing something completely different can you help me  1st time it happened i was doing my routine workout 2nd time i was standing up from the dinner table 3rd time i was taking a shower and ended up falling down  i have never had this happen before its a little scary [ Disease ] this is a disease resulting from the abnormal reaction by the body is immune system to gluten a protein found in many grains such as wheat rye and barley and other foods in people who have celiac disease the immune system causes damage to the small intestine and prevents the proper absorption of nutrients from food symptoms include diarrhea anemia and weight loss