O nisi o mafuaʻaga e le masani ai o le mumū o le gastrointestinal tract. O nisi o mea masani e aofia ai vailaʻau (e pei o NSAIDs), o nisi o meaʻai e pei o le lactose (i latou e le faʻapalepale), ma le gluten (i latou e maua i le faʻamaʻi o le celiac). O le faʻamaʻi o Crohn o se mafuaʻaga e le masani ai o le (masani ona ogaoga) gastroenteritis. O faʻamaʻi e lua i vailaʻau oona e mafai foi ona tupu. O nisi o faʻamaʻi e fesoʻotaʻi ma meaʻai e fesoʻotaʻi ma le manava tiga, vomiting, ma le manava tatā e aofia ai: c oona ona o le taumafaina o iʻa faʻaleagaina, tetiguatera e fesoʻotaʻi ma le taumafaina o nisi ituaiga o iʻa faʻaleagaina, faʻaleagaina o le faʻamaʻi o le faʻamaʻi o le faʻamaʻi o le faʻamaʻi
vailaau oona