For inflammation and reducing fat from belly, the foods rich in Omega 3 fatty acids are best. Researchers say that low percentage of omega 6 fatty acids and maximum intake of omega 3 fatty acids are closely linked with the reduction of inflammation and belly fat. Walnuts, flax seeds fish particularly salmon are the sources from which you can get maximum omega 3 fatty acids. Decrease your belly fat by increase the percentage of omega 3 fatty acids in your body.