Inflammation and oxidative stress are important features of traumatic ulcerative colitis (UC). Turmeric has been used as a dietary and functional ingredient for its potent anti-inflammatory effects in UC therapy. However, its practical effectiveness is hindered by limited reactive oxygen species (ROS) elimination properties. To address this, we constructed a unique treatment agent by growing cerium oxide (CeO(2)) nanocrystals on the membranes of turmeric-derived nanovesicles (TNVs), named as TNV-Ce. The resulted TNV-Ce could suppress inflammation and exhibit exceptional ROS-scavenging activity, which was validated both in lipopolysaccharide-induced macrophages and dextran sulfate sodium salt-induced chronic colitis mouse model. Following oral administration, TNV-Ce significantly accumulated at inflamed sites, effectively eliminating ROS and inhibiting pro-inflammatory cytokines for synergistic action against UC.