 Several recent reports have associated satiety effects with fermentable fibre sources in human dietary studies Nillson et al., 2008, Parnell Weimer, 2009, Willis et al 2009. Apparently, the large intestine microbiota recovers extra calories from the diet and might contributes to obesity Ley et al., 2006, Turnbaugh et al., 2008, Cani et al., 2007. However, the different mechanisms involved in lean and obese subjects are not completely resolved Duncan et al., 2008, Schwiertz et al., 2010. Recent evidence in experimental animal designs indicates that changes in gut microbiota composition may be associated with increased food intake and obesity Vijay-Kumar et al., 2010 suggesting that satiety and intake are influenced by the species composition of the gut microbiota. 