LAUSR

Abstract Soluble dietary fibre (DF) enrichment of carbohydrate-rich foods is one strategy to reduce type 2 diabetes (T2D) risk. However, glycemic response to specific soluble DF, and in particular, the contribution of soluble DF-induced viscosity, needs research. This study examined acute postprandial glycemic response of puddings containing agriculturally-derived soluble DF [yellow mustard mucilage (YMM), fenugreek gum (FG), flaxseed mucilage (FM)] matched for apparent viscosity under simulated small intestinal conditions (rather than concentration), in 15 adults at elevated T2D risk (age 55.1 ± 12.0 years; BMI 29.5 ± 3.4 kg/m 2 ) using a randomized, double-blind, crossover design. Blood glucose and plasma insulin at peak concentration and specific time points were significantly decreased by all soluble DF puddings compared to a control pudding, but did not differ from each other. This study demonstrates that viscosity-matched soluble DF in a pudding matrix can reduce acute postprandial peak glucose and insulin, and T2D risk.