Interested in knowing the symptoms of fructose malabsorption?? I am tracking causes of my gut problems. I have very frequent diarrhea, from loose stools to watery explosions many times in a day or throughout the night. I take a lot of Immodium which is helpful and use Metamucil daily. I am not a sweets fan and have no diet sodas, very few colas, cookies, candies, cakes, syrups, etc. and nothing with artificial sweeteners. Cannot tolerate iceberg lettuce, but romaine and most other raw greens are ok. Cooked greens are no problem. I never know what I have ingested that sets it off and nothing is identified as always a culprit. At times, walking into a store and smelling chemicals such as "sizing" can send me rushing to the restroom. I have been tested for most of the usual conditions, with negative results. I have had an Interstem device implanted to control stimulation of anal muscles. No luck. Probiotics have not done much for me although I subscribe to the idea that they must be live culture. I fear that none or very few of my meds or supplements are being metabolized for the needed benefit. I very often see them in whole form in the toilet after a bm. My nails and skin & hair are in awful condition, nails peeling, splitting, crumbling. I am leaning toward the possibility of "leaky gut". If you have experience or symptoms such as these, I would appreciate your comments and possible suggestions.