Sensitive to Sugar
Fructose is whats called a simple sugar. Found naturally in many fruits, fructose is widely used as a sweetener (often as high fructose corn syrup) in foods ranging from catsup to bread. Normally, fructose is absorbed in the small intestine. But in people with FM, fructose passes directly into the large intestine, where bacteria ferment it, producing gaseshydrogen, carbon dioxide and methane. Abdominal pain, bloating, gas, belching, diarrhea or constipation may result.