Omega-3 fatty acids–polyunsaturated fats found in coldwater fish, canola oil, flaxseeds, walnuts, almonds, and macadamia nuts–also count as good fat. Recent studies have shown that populations that eat more omega-3s, such as Eskimos (whose diets are heavy on fish), have fewer serious health problems such as heart disease and diabetes. There is evidence that omega-3 oils help prevent or treat depression, arthritis, asthma, and colitis and help prevent cardiovascular deaths.
(Study: Prevention Magazine. Online at www.prevention.com.)