Dr. Rasgon, Director of the Stanford Center for Neuroscience in Women's Health, is conducting a longitudinal 3-year study on the effects of insulin resistance on accelerated cognitive aging. Eligibility criteria: -men and women -between 25 and 50 years of age -BMI between 25 and 35 -not diagnosed with Type 1 or Type 2 diabetes Appointments include blood testing for glucose and insulin levels, a blood draw for genotyping, memory testing, and a structural and functional MRI scan. We are offering up to $250 compensation for participation over the 3 years. Please email myoraku@stanford.edu or call 650-736-2182 for more information.