Clinical Research Directory

Exclusion Criteria: 1. Diabetes or fasting plasma glucose 126 mg/dL 2. Body mass index (BMI) 30 kg/m2 3. Anemia (female subjects hemoglobin of \<11 g/dl and male subjects hemoglobin \<12 g/dl) 4. Active coronary artery disease or history of unstable macrovascular disease (unstable angina, myocardial infarction, stroke, and revascularization of coronary, peripheral or carotid artery within 3 months of recruitment) 5. Renal failure (serum creatinine \> 1.5mg/dl) 6. Chronic active liver disease (AST\>144IU/L or ALT\>165IU/L) 7. Oral warfarin group medications or history of blood clotting disorders. 8. Smoking 9. Pregnancy or breastfeeding 10. Alcohol consumption greater than 2 glasses/day or other substance abuse 11. Untreated or uncontrolled hypothyroidism 12. Debilitating chronic disease (at the discretion of the investigators)