The following question focuses on a specific saccharide. There are athletes who cannot consume juices during exercise as it causes them severe intestinal cramping, is this due to fructose or another factor?© BrainMass Inc. brainmass.com October 10, 2019, 7:55 am ad1c9bdddf
The main cause of GI problems, including intestinal cramping, amongst athletes who consume juice is fructose malabsorption. It's caused by a deficiency of a protein in the small intestine. Fructose is absorbed easily when it is paired with glucose. Most fruits are not made with an equal ...
This solution describes the reason for nausea caused by fructose during exercise.