Fructose malabsorption is a gastro-intestinal disorder, characterized by the inability to absorb fructose efficiently. As a consequence fructose reaches the colon where it is broken down by bacteria into short chain fatty acids, CO2, lactic acid, CH4 (methane) and H2 (hydrogen). This will usually induce bloating, cramps, osmotic diarrhea along with other symptoms of irritable bowel syndrome and can be seen in about 50% of fructose malabsorbers.

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