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Chronic transmural inflammation and proteolytic destruction of medial elastin are key mechanisms in the development of abdominal aortic aneurysms (AAAs). Diferuloylmethane (curcumin) is a major component of the food additive tumeric, which has been shown to have anti-inflammatory properties. To determine if ingestion of curcumin influences aneurysmal degeneration, C57Bl/6 mice underwent transient elastase perfusion of the abdominal aorta to induce the development of AAAs, followed by daily oral gavage with 100 mg/kg curcumin (n = 36) or water alone (n = 31). By 14 days, mice in the control group developed a mean increase in aortic diameter of 162.8 ± 4.6% along with a dense mononuclear inflammation and destruction of medial elastin. By comparison, the mean increase in aortic diameter in the curcumin-treated group was only 133.2 ± 5.2% (p < 0.0001). Although aortic wall inflammation …