Hariho impamvu nyinshi zo guhagarika gastrointestinal, kandi izisanzwe ni abarwayi bafite ibibyimba bibi bitandukanye, cyane cyane ibibyimba bibi bya gastrointestinal. Nk’uko imibare ituzuye, abagera kuri 30% b’abarwayi bafite ibibyimba byo mu gifu bazahura n’inzitizi zitandukanye, ibyo bigatuma abantu badashobora kurya bisanzwe, biherekejwe n’ububabare bwo mu nda, kubyimba, ndetse no mu bihe bikomeye, gutobora gastrointestinal, ndetse ndetse ubuzima bwangiza ubuzima.