In a double-blind, randomised crossover study, two sourdough croissants (SC) or two brewer's yeast croissants (BC) were served to 17 (9 F; Age range 18-40; BMI range 18-24 kg/m2) healthy subjects to evaluate the effects of their ingestion on postprandial gastrointestinal functions. Hydrogen breath test was performed to measure H2 production after SC and BC ingestion. Gastric volume was evaluated by Magnetic Resonance(MR) Imaging to calculate gastric emptying rate in the 3-hour interval following croissant ingestion. Palatability and postprandial gastrointestinal symptoms and perceptions over a 4-h period after the meal were evaluated by visual analogue scale (VAS). In addition, in the 3-hour interval, blood samples were drawn to measure serum glucose levels. The area under the curve (AUC) was employed to evaluate global kinetics of all parameters and the T-test was used to evaluate differences between groups.