Beta-mannans
Beta-mannans are a group of closely related heat-resistant compounds that survive the drying/toasting phase of soy bean processing. β-mannans comprise about 1.3% of the 48%-CP SBM product and 1.5-1.7% of the 44%-CP SBM product, with an estimated β-galactomannan content of 1.83% and 2.22%, respectively. Mannans, mainly associated with the hull and fibre fraction of SBM, are intensely anti-nutritional due to their highly viscous properties, likely decreasing the efficiency of the monogastric’s carbohydrate utilisation by partially blocking key sites on the intestinal surface and resulting in a lower performance.