Metabolic syndrome (MetS) increases the risk of type 2 DM and cardiovascular disease. We here evaluated the effects of a calorie-restriction diet with 2.13 g/day n-3 long-chain polyunsaturated fatty acid supplementation in MetS patients. The 188 participants were randomly assigned one of four calorie-restriction diets for 12 weeks: calorie-restriction (n = 44), calorie-restriction meal replacement (n = 45), calorie-restriction with fish oil (n = 44), or calorie-restriction meal replacement with fish oil (n = 44); 179 participants completed the trial. After treatment, all groups had significant reduction in waist circumference, blood pressure, and cardiometabolic parameters. Results indicate that long-chain polyunsaturated fatty acid (LC-PUFA) supplementation under calorie-restriction exert beneficial effects on metabolic parameters.
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