In vitro model to correlate viscosity and bile acid-binding capacity of digested water-soluble and insoluble dietary fibres

► A model for the determination of the bile acid-binding of dietary fibres was developed. ► For some fibres clear correlations between viscosity and bile acid-binding were observed. ► Heat damaged oat fibre had good bile acid-binding despite of low viscosity. ► Bile acid-binding is not solely based on viscosity but also on additional binding forces.