Thank you for posting query at HCM presentation: long history of diarrhea with tremendous loss of weight. Celiac disease / gluten insensitivity is less likely, most likely differential : Inflammatory bowel disease or adenoma or tumor i strongly advice you to visit gastroenterologist at earliest and fix an appointment to undergo colonoscopy . meanwhile until test result awaited, advice: - drink boiled water - take ispagula with yogurt - AVOID junk food(NO burger , pizza) altogether, - avoid refired food and canned food - avoid beverages / alcohol/ soft drinks any further questions are welcomed. hope to answer your concern. Health professionals aim to diagnose properly and manage patients according to their limited knowledge. Cure is blessed by the ONE who Created us, whose power and knowledge is unlimited . wish you good health. regards, Dr Tayyab Malik