Interleukin-6 (IL-6) is possibly another factor associated with inflammatory detriment within the portal system. High levels of IL-6 are a marker for inflammation and vascular pathology. Obese subjects demonstrated a 50% greater portal vein IL-6 concentration, demonstrating, again, the profound effect visceral fat has on pathogenic indicators. Portal vein IL-6 correlates with systemic C-reactive protein concentrations. C-reactive protein is associated with cardio- and peripheral vascular disease. C-reactive protein and oxidative stress are now presumed to interact in the early inflammatory processes of atherosclerosis. This is significant for young obese individuals. Although more research is necessary for conclusive association, C-reactive protein may be a new risk factor for CAD in individuals under 25 years of age.