 Subjects will report to MGH or MIT Clinical Research Center after an overnight fast. Each subject will undergo a history and physical exam to assess for safety and compliance. Fasting blood work will be obtained. A bionutritionist will measure subjects height, weight, hip and waist circumference and calculate a waist to hip ratio. They will receive 50 mg of either etanercept or placebo, given as two 25 mg doses subcutaneously, at different body sites. 