Effects of mulberry leaf and white kidney bean extract mix on postprandial glycaemic control in pre-diabetic subjects aged 45–65 years: a randomized controlled trial

•Anti-diabetic effect of mulberry leaf and white kidney bean extract mix was tested.•Ingesting the mix with a meal decreased the glucose, insulin, and C-peptide levels.•Taking the mix with a meal reduced the iAUCs for glucose, insulin, and C-peptide.•The mix could improve postprandial glycemic control in pre-diabetic individuals.