Any of several polyunsaturated fatty acids found in leafy green vegetables, vegetable oils, and cold-water fish, such as salmon and mackerel.

Omega-3 fatty acids are capable of reducing serum cholesterol levels and have anticoagulant properties.

Omega-3 fish oil is considered a neutraceutical, a food that provides health benefits. Eating fish has been reported to protect against age-related macular degeneration, a common eye disease.