Linked from
The 4 pages that link to Flatulence, each with the reason it gives.
DefecationCompared with: It uses the same outlet but releases gas rather than feces.
LactuloseRelated: Colonic fermentation of lactulose commonly produces gas.
BelchingCompared with: It is another route for digestive gas to leave the body.
RaffinoseRelated: Raffinose fermentation can increase intestinal gas and contribute to flatulence.