Symptoms of fructose malabsorption?

Diarrhea: Fructose malabsorption can result in loose stools due to increased osmotic load in the gastric lumen. Hereditary fructose intolerance is different condition in that fructose is not metabolized well after absorption.

Gas,bloat, diarrhea: Fructose is a sugar that can be malabsorbed, just like lactose (milk sugar); bacteria in the gut will ferment the undigested sugar; fermentation products cause gas, bloat, cramps, diarrhea-depending on the "dose" of fructose. Fructose is found in fruits, e.g. Pears, apples. High fructose corn syrup is not high fructose, but is compared to cs (all glucose). High fruct cs is similar to sucrose.