The Effect of a Natural Extract on the Post-prandial Blood Glucose Response After Bread Consumption: a Dose-response of Efficacy

Inclusion criteria: * Body mass index (BMI) ≥ 18.0 and ≤ 30.0 kg/m2. * Apparently healthy males and females: no medical conditions which might affect the study measurements including diabetes type 1 and type 2, gastrointestinal dysfunction, gastrointestinal surgery and inflammatory diseases. * Fasting blood glucose value of subjects ≥ 3.4 and ≤ 6.1 mmol/litre (i.e. 62-110 mg/dl) at screening. Exclusion criteria: * Use of antibiotics within 3 months before day 1; use of any other medication except paracetamol, within 14 days before day 1. * Blood donation in the past 3 months and/or during the study. * Reported intense sporting activities \> 10 h/week. * Consumption of \> 14 units (female subjects) and \> 21 units (male subjects) alcoholic drinks in a typical week. * Reported dietary habits: medically prescribed diet, slimming diet, not used to eat 3 meals a day, vegetarian. * If female, is pregnant (or has been pregnant during the last \< 3 months) or will be planning pregnancy during the study period. * If female, is lactating or has been lactating in the 6 weeks before screening and/or during the study period. * Dislike, known allergy or intolerance to test products or other food products provided during the study.