The Effects of a Diet Enriched With Dietary Fibre on Glycaemic Response, Gastrointestinal Tolerability, Satiety, and Microbiome Functionality (The Fibre Full Study).
This study will systematically investigate the effects of a diet with decreased energy density, reduced glycaemic index, and significantly increased dietary fibre, on post-prandial glycaemic response, satiety, gastrointestinal tolerability and gut microbiota composition and function in individuals with excess body weight (Body Mass Index (BMI) 25-35kg/m2). Hypothesis: The investigators hypothesise that a diet enriched in fibre will be beneficial to post-prandial glycaemic response, well tolerated and satiating, as compared to the standard Western-style diet.
• Be willing and able to give written informed consent.
• Be between 18 and 45 years of age
• Have a Body Mass Index (BMI) of 25-34.9kg/m2 (Overweight or Obese Class I)
• Have had a stable body weight (≤5% change over the past three months)
• Be in general good health as determined by the investigator through interview and vital signs (blood pressure, pulse, temperature). Systolic blood pressure less than 160mm Hg and diastolic blood pressure less than 100 mm Hg (defined as Hypertension stage 2).
• Be willing to avoid consuming dietary supplements, prebiotics, probiotics, or fibre-rich supplements within four weeks prior to the baseline visit, and until the end of the study.
• Be willing to avoid physical exercise for the duration of the study (physical exercise defined as any physical activity that is planned to achieve a fitness goal)
• Be willing to consume the investigational products daily for the duration of the study.