Nature Made Fish Oil supply comes wild caught ocean fish, not farm raised fish.State-of-the-art purification processes are used to remove PCBs, dioxins and furans, and mercury to ensure purity levels below 0.09 ppm, 2 ppt WHO TEQs, and 0.1 ppm respectively.Supportive but not conclusive research shows that consumption of EPA and DHA omega-3 fatty acids may reduce the risk of coronary heart disease. (See nutrition information for total fat, saturated fat and cholesterol content.)Purified to remove mercuryNo Color Added