Breakfast Consumption and Its Effects on Glycemic, Insulinemic and Non-Esterified Fatty Acids Responses

The aim of this study is to determine whether eating breakfast or having no breakfast has subsequent beneficial health effects, specifically in relation to glycemic response throughout the day and postprandial insulin and non-esterified fatty acids (NEFA) responses 6 hours after breakfast/lunch.

This will be a randomised, crossover study with two treatments in total. 1.) Subjects given with breakfast, 2.) Subjects not given breakfast. Each of the two test visits will last for approximately 9 hour (spanning over 3 days), during which the following will take place: On Day 1, subjects will come to have the continuous glucose monitoring (CGMS) system inserted. CGMS will be used to measure 24 hour blood glucose concentrations. On Day 2, an indwelling catheter will be inserted into the ante cubital fossa or forearm vein of one arm and will be kept patent. One fasting blood sample (baseline; 4 milliliters of venous blood) will be collected. Participants with breakfast treatment will then consume the test meal within 15 minutes. Subsequently, blood samples will be taken at 15, 30, 45, 60, 90, 120, 150 and 180 minutes.At time 180 minutes, participants will be given a standardized lunch to be consumed within 30 minutes. Blood samples will be taken after lunch at 210, 240, 270, 300, 330 and 360 minutes. On Day 3, subjects will need to come for removal of the CGMS sensor. Subjects will come to the CNRC again for the 2nd test visit, with at least 3 days wash-out in-between visits.