This study investigated glucose metabolism in the forearm during fasting and postprandial states, comparing overweight men with lean men. We sought to understand how glucose is metabolized to prevent hyperglycemia in insulin-resistant obese men and the implications of increased basal glucose uptake in this population. Our findings reveal that overweight men exhibit elevated basal glucose uptake in the face of increased insulin concentrations and, unlike lean men, very limited basal lactate output. The overweight group demonstrated increased alanine release, suggesting a pathway toward enhanced hepatic gluconeogenesis.