Apre yo fin manje prebyotik, yo ale dirèkteman nan gwo trip la, kote yo fèrmante pa bakteri kolifòm pou itilizasyon enèji, epi yo pwodui asid gra -chèn kout SCFA, sitou asid acetic, asid propyonik ak asid butirik, osi byen ke asid laktik ak gaz. [6]
(1) Pwodiksyon asid
The organic acids generated by the intestinal flora metabolize food, on the one hand, can provide the energy needed by the human body, on the other hand, it can reduce the pH value of the intestinal tract and form an environment that is not conducive to the survival of pathogenic bacteria, thereby effectively inhibiting intestinal corruption and improving. The absorption rate of mineral elements, promote intestinal peristalsis and facilitate defecation. Generally, Lactobacillus only produces lactic acid, while Bifidobacterium mainly produces acetic acid and a small amount of lactic acid. After prebiotics are metabolized by intestinal flora, a large amount of organic acids will also be generated, which will lower the intestinal pH [7]. Among them, galacto-oligosaccharide and lactulose had the largest acid production, and inulin had the smallest acid production. The production of various organic acids after prebiotics are metabolized are: acetic acid LACT, GOS, SOS>FOS, IMO, XOS>Inulin; lactic acid GOS, SOS>XOS, IMO, LACT>FOS, Inulin; propionic acid LACT, Inulin , XOS, FOS>SOS, COS>IMO. [6]
(2) Pwodiksyon gaz
Anplis de bifidobakteri ak laktobazil nan aparèy entesten imen an, prèske tout lòt Flora ka pwodwi gaz, sa ki lakòz kò imen an fè eksperyans diferan degre nan flatulans ak farting. Apre prebyotik yo metabolize pa flora entesten, yon sèten kantite gaz tankou CO2, H2, ak CH4 ka pwodwi. Tann. Akòz diferans ki genyen nan lyezon glikozidik ak konpozisyon, divès kalite prebyotik pral itilize pa diferan kalite bakteri ki pwodui -gaz, epi gaz ki pwodui a pral diferan. Rycroft et al. konpare pwodiksyon gaz total de diferan prebiotik atravè eksperyans nan vitro, epi li te jwenn ke isomaltooligosaccharides ak galactooligosaccharides se prebiotik yo ki gen pi piti pwodiksyon gaz total, pandan y ap inulin se youn nan pi gwo pwodiksyon gaz total (gade imaj 3). Anplis de sa, Oku et al. [fè verifikasyon klinik sou pwodiksyon idwojèn twa prebiotik, oligofructose, oligofructose, ak isomaltooligosaccharide. Pa gen pwoblèm dòz la dyetetik nan 10g / d oswa 20g / d, tout Fruktoz oligomerik pwodui pi gwo kantite gaz idwojèn, pandan y ap isomaltooligosaccharides pwodui pi piti kantite gaz idwojèn.