Fig. 3. Mean change of serum insulin concentration from baseline. Letters indicate time points where insulin concentrations are significantly different from baseline. The gastrointestinal lipid load was given immediately prior to the first blood collection (minute 0). Oral stimulation occurred from minute 0 to 110. Oral stimuli: SFA = butter, UFA = unsaturated margarine, CHO = jelly, UFA + CHO = unsaturated margarine + jelly, Veh = vehicle, and NO = no oral stimulus.