Dietary fibre are glycans and the indigestible portion of food derived from plants. The definitions of dietary fibre and prebiotics partly overlap in that both components reach the colon unaffected by pH or enzymatic digestion (Wegh et al. 2017). However, many dietary fibres affect the microbiota composition as a whole and through other mechanism than that of selective use by specific microbiota species. Thus, many fibres do not qualify as prebiotics (Gibson et al. 2017).