Unlike bread, the solubilities obtained using the two digestion methods were similar except for freeze drying at -18 and -80 oC, the RVA method reported a significantly lower solubility. Moreover, there were no significant differences in β-glucan viscosities between the two methods in all treatments except for freezing at -18 oC and by liquid nitrogen. Generally, all freezing conditions resulted in porridge with β-glucan viscosity and solubility comparable to the fresh one. On the other hand, freeze drying conditions resulted in a reduction of β-glucan viscosity. The viscosity of β-glucan extracts obtained from oat bran porridge conducted in the RVA and water bath was comparable with fairly good correlation (R2 ¼ 0.69). The solubilities and viscosities are similar to those reported previously for fresh porridge with 1.5% oat b-glucan (Regand et al., 2009) which significantly reduced post-prandial peak blood glucose rise.