An athlete complains of bloating, abdominal pain, and vomiting during practice. He states that he had an apple a few hours before practice. What do you suspect may be the cause of his symptoms?

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Fructose intolerance, or fructose malabsorption, results from an ineffective carrier protein that impedes the absorption of fructose in the small intestines. People with fructose malabsorption suffer from gastrointestinal symptoms, such as bloating, abdominal pain, vomiting, and flatulence after eating fructose-containing foods. Foods high in fructose include many fruits and some vegetables, as well as processed foods containing high-fructose corn syrup.

An Athlete Complains of Bloating, Abdominal Pain, and Vomiting During