obesityResearch appearing in the Journal of Nutrition (Dec;137(12):2629-34) shows that fish oil promotes weight-loss. This supports earlier research that shows that fish oil lowers cholesterol and reduces the tendency toward obesity. The researchers divided mice bred to be obesity prone into two groups. They fed the mice a high-fat diet, with one group receiving fish oil, the other acting as a control. The group receiving the fish oil gained significantly less weight. In a separate experiment, the researchers found that fish oil increased the activity of genes related to lipid metabolism. “…upregulation of intestinal lipid metabolism is associated with the anti-obesity effect of fish oil,” according to the researchers.