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BACKGROUND Cardiovascular disease is the major cause of morbidity, mortality, and disability in Iranian people. Inflammation and oxidative processes are key components of cardiovascular disease. The aim of this study was to evaluate the effect of conjugated linoleic acids (CLA) and omega-3 fatty acid (ω-3 fatty acids) supplementation on inflammation markers and oxidative stress in atherosclerotic patients. METHODS This study was a two-month clinical, randomized trial. 90 volunteers who referred to Emam Reza Heart Clinic of Shiraz University of Medical Sciences (Shiraz, Iran) from February to March 2011 and had the inclusion criteria of this study were selected. Participants were classified into 3 groups receiving 3 g/d CLA, 1920 mg/d ω-3, or placebo for 2 months. C-reactive protein (CRP), interleukin-6 (IL-6), malondialdehyde (MDA), and glutathione peroxidase (GPx) were measured before and after supplementation. RESULTS The hs-CRP level decreased significantly in both the omega-3 and CLA group (P < 0.05). IL-6 reduced significantly in the ω-3 group, but the reduction of IL-6 levels in the CLA group was not significant. GPx increased in the CLA and omega-3 groups (P < 0.05). MDA level decreased significantly in both omega-3 and CLA groups (P < 0.05). Comparison between the groups indicates a significant change in CRP levels in the ω-3 group relative to the control group. However, other indices did not cause any significant change in the ω-3 and CLA groups in comparison to the control group. CONCLUSION Diet supplementation with CLA and ω-3 can have a beneficial effect on some indices of inflammatory and oxidative stress.

Effect of conjugated linoleic acid and omega-3 fatty acid supplementation on inflammatory and oxidative stress markers in atherosclerotic patients