A Prospective Collection of Peripheral Blood and Urine Specimens to Study C-peptide and Insulin in Healthy Individuals

Inclusion Criteria: * Males and females, age ≥ 18 years * Fasting for 12 hours prior to blood draw and random urine collection * Able to understand and willing to provide informed consent * Normal HbA1c (e.g. less than 5.7%) and glucose (e.g. less than 100 mg/dL) levels Exclusion Criteria: * Males and females, age \<18 years * Has a current diagnosis of any clinically significant cardiac, respiratory, neurological, immunological, hematological, liver disease, renal disease, gastrointestinal (GI) disorder, including any history of hyper- or hypothyroid, peptic or gastric ulcers or GI bleeding, or any other condition which, in the opinion of the investigator, would deem the subject unhealthy and therefore, ineligible. * Has a history of any clinically significant cardiac, respiratory, neurological, immunological, hematological, liver disease, renal disease, gastrointestinal (GI) disorder, including any history of hyper- or hypothyroid, peptic or gastric ulcers or GI bleeding, or any other condition which, in the opinion of the investigator, is unstable at the time of enrollment. * Current diagnosis or prior history of any type of diabetes including gestational diabetes. * Currently taking or history of insulin therapy for any disease. * Elevated HbA1c level (e.g. greater than 5.7%) * Elevated glucose level (e.g. greater than or equal to 100 mg/dL) * Is receiving systemic chemotherapy or radiation treatment, has an active malignancy of any type, or has been diagnosed with cancer within 5 years before screening other than basal or squamous cell skin cancers or in-situ cervical cancer. * History of seizures * Diagnosed with an infectious disease including any sexually transmitted diseases. * Diagnosed with HIV/AIDS or ever tested positive for HIV. * History of hepatitis * Subject that has had sexual contact with a person who has hepatitis within the last 12 months. * Pregnancy or lactation * Non-fasting for 12 hours prior to blood and random urine collection. * Hemolytic blood specimen * Unable to provide informed consent