Sympathetic-vascular Dysfunction in Obesity and Insulin Resistance (Vitamin C Study)

"Ascorbic acid solution (American Regent Laboratories Inc.) will be obtained from the KU Investigational Pharmacy located in the KU Clinical Research Center where studies will take place. A priming bolus of 0.06 g ascorbic acid/kg fat free mass (FFM) dissolved in 100 mL of saline will be infused intravenously at 5 mL/min for 20 minutes, followed immediately by a drip-infusion of 0.02 g/kg FFM dissolved in 30 mL of saline administered over 2 hours at 0.5 mL/min."

Placebo (saline) will be administered