Hi bissonnette. There is not too much info I have. Long term diarrhea is considered as chronic, and a few common reasons came to my mind. One is a serious deficiency of pancreas; therefore, foods are not digested properly, fermented by yeast and other microorganisms in the gut. Indigested foods, in turn, irritate the gut wall causing diarrhea. Another reason may be Candida-yeast overgrowth after taking antibiotics. It leads to condition like IBS (irritable bowel syndrome) with diarrhea. We cannot rule out also chronic parasite infection and food sensitivity. All these conditions can be combined and aggravate each other. I do not believe that symptomatic treatment and eat banana really change your life. However, you think right to try to eat food products with probiotics. What can be helpful? Start with: • Strictly diet two months: no wheat, no sugar, no milk, no sweet fruits (banana too) • Apple, pomegranate, coconut oil, green tea, garlic, hard-boiled eggs are good to lessen diarrhea • Buy probiotics – friendly bacteria on the refrigerator in health store and take twice as it is recommended • Warm Karlovy Vary healing mineral water before meals • Enemas or colon hydrotherapy • Find an acupuncturist. Your condition is known by Chinese medicine as “Spleen Qi deficiency” so herbs and acupuncture can relive diarrhea • Indigestion leads to deficiencies. Vitamins C, B’s, D are needed The best way is working with a knowledgeable health practitioner. Useful information may also be found in my book. I wish you a good health