 Our primary hypothesis states: CC subjects have a preference for high-fat and -protein foods and therefore high levels of Bacteroidetes, Actinobacteria and similar species in the gut are expected. Moreover, reducing intake of saturated fat and increasing prebiotics will be more effective in inducing a healthier gut microflora profile in CC subjects than in those with the TT genotype, with opposite effects observed when the diet is switched to one high in saturated fat. 