Does Soluble Fiber Supplementation Result in Lower Postprandial Blood Glucose in Women With Gestational Diabetes Compared With no Supplementation After a Standardized Breakfast?

The objective of this study is to investigate the effect of supplementation of 10g soluble fiber from guar on postprandial blood glucose levels in women with gestational diabetes after consumption of a standardized meal compared with no supplementation. Null Hypothesis H0: Soluble fiber supplementation will not result in a lower postprandial blood glucose increase in women with gestational diabetes compared to no supplementation after consumption of a standardized meal. Alternative hypothesis H1: Soluble fiber supplementation will result in a lower postprandial blood glucose increase in women with gestational diabetes compared to no supplementation after consumption of a standardized meal. Study participants are randomly assigned to the intervention (consumption of a standardized meal and 10g soluble fibre) or control group (consumption of a standardized meal without soluble fibre). After a 2-day wash-out phase, the two groups are switched (the intervention group becomes the control group and vice versa) with the same standardized procedure.