Patterns of malabsorption of FODMAPs
| Oligosaccharides Fructans: no suitable small-intestinal hydrolases—negligible absorption Galacto-oligosaccharides: no human alpha-galactosidase—minimal absorption |
| Disaccharides (lactose) No absorption if lactase is deficient |
| Fructose Absorptive capacity limited when in excess of glucose—low in 30% (considered to have fructose malabsorption) |
| Polyols Slow passive diffusion and absorption only (< 20%) |
FODMAPs = fermentable oligosaccharides, disaccharides, monosaccharides, and polyols