Physiologic Markers of Cardiometabolic Risk in People With Type 1 Diabetes

Hyperinsulinemic-euglycemic clamp will be used to assess insulin resistance. After IVs are placed, participants will be transitioned to intravenous insulin administration for the baseline portion of the study. Stable Isotope Tracer Infusions will assess rates of glucose, lipid metabolism, and beta-hydroxybutyrate turnover during the last 30 minutes of the baseline equilibration period and again during the last 30 minutes of the stepped IV insulin infusion periods.

After a 12 hour overnight fast, baseline levels of the lipoproteins will be drawn. The YCCI Bionutrition Service kitchen will prepare the standardized high-fat meal. Participants will administer their bolus insulin per their home regimen for the carbohydrates in the high-fat meal, and then they will consume the meal within a 15-minute timeframe.