Whole Food Fibers for Prediabetes

The purpose of this supplementation study is to understand how whole food fibers may affect gut microbiota composition and overall health. The investigators will enroll up to 24 people in this study. To be eligible, participants need to be between 18 and 65 years old, have a Body Mass Index of 25 to 35 kg/m², be prediabetic (HbA1c: 5.7 - 6.3), be free of any inflammatory bowel disease or any colon-related disease, be free of wheat allergens or intolerance, and not be pregnant or nursing. If participants have any questions about the criteria, they will ask the investigator consenting them. This is a randomized, cross-over, double-blind, clinical trial (RCT) that will last 12 consecutive weeks in total (4 weeks of treatment A + 4 weeks of washout + 4 weeks of treatment B). The order of the treatments will be randomly assigned before the beginning of the study. If proved right, this study will provide a science-based fiber reason why consumption of whole foods constitutes a better dietary approach than the current practice of adding soluble dietary fiber (inulin) alone to modulate gut microbiota for gut and whole-body health.