What is fructose intolerance? Can those affected no longer eat any fruit at all and which types of fruit cause particularly severe symptoms? You can find the answers to these questions here.
A fruit salad with apples, mango, and grapes is delicious – but for some people, it really upsets the stomach, more precisely the intestines: Eating fruit causes unbearable abdominal cramps, flatulence, and annoying diarrhea.
A so-called fructose intolerance, intolerance to fruit sugar, is to blame for the health problems. The cause of this indigestion lies in the small intestine, whose mucous membranes can only insufficiently digest the fructose. This is how fructose gets into the large intestine, where it is broken down by bacteria. In the process, hydrogen and other gases are formed. This gas development is used in the diagnosis. Because the hydrogen gets into the lungs via the bloodstream and is exhaled by the patient. The gas formation can be measured with a breath test. But all too often doctors grope in the dark when patients ask for advice about their unclear abdominal pain and diarrhea. Many have a long ordeal behind them before fructose intolerance is recognized.
Congenital fructose intolerance
In rare cases, the fructose intolerance is congenital – one speaks here of hereditary (= inherited) fructose intolerance – and can lead to severe organ damage. Only extensive tests can provide information.