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Omega-3 fatty acids are a type of polyunsaturated fat. They are considered “good” fats because they can help lower cholesterol and triglyceride levels. Omega-3s are also thought to have anti-inflammatory properties, which may help reduce the risk of chronic diseases such as heart disease, arthritis, and cancer. The American Heart Association recommends that people eat at least two servings of fish per week to get the benefits of omega-3s. Some good sources of omega-3 fatty acids include salmon, herring, mackerel, tuna, sardines, and anchovies. Omega-3 supplements are also available in pill form.