5. Fasting glucose > 165 mg/dL, glycosylated hemoglobin > 8%, or any treatment with oral hypoglycemic agents, insulin sensitizing agents (e.g. metformin or thiazolidinediones), insulin, incretin mimetics (e.g. exenatide), amylin analogues (e.g. pramlintide), or endocannabinoid receptor antagonists (e.g. rimonabant). Volunteers with type 2 diabetes and a glycosylated hemoglobin level of 7.5% or higher will be encouraged to discuss treatment options (e.g. pharmacotherapy versus study participation) with their primary care providers before enrolling in the study