One option for treating fructose malabsorption (intestinal fructose intolerance) is a change of diet. Usually, a physician or nutritionist draws up an individual plan that initially ensures a considerable decrease in fructose intake.Next, fructose consumption is gradually stepped up again in order to establish the patient's personal tolerance limit. As part of this therapy, patients should keep a diet journal: it helps to identify foodstuffs that cause complaints – and those that can be eaten with no problem at all.