Soy milk powder (SMP) contains no less than 38.0% soy protein, 13.0% soy fat and 90% total solids (SAA., 1996; Zhang, Tatsumi, & Isobe, 2005). Commercial soy milk powders generally contain approximately 15.5–16.0% total dietary fibre (TDF) which can orig- inate from either the soybean hull or the cotyledon and include different ratios of soluble and insoluble fibres.