<qa>  What is the glucose load at baseline?Oral Glucose Tolerance Test OGTT: Screening consists of a glucose load of 75 g at baseline time 0. At 7 am, after a 12-h fast, a flexible intravenous catheter will be placed in an anticubital space. Blood samples will be collected at times 0, 10, 20, 30, 60, 90, and 120 minutes. Sera will be stored at -85oC until analyzed for glucose, insulin, and C-Peptide. Whole-body insulin sensitivity and β cell responsiveness will be derived via OGTT at baselineweek 12. 