Size:180 From the FDA’s website: Supportive but not conclusive research showsthat consumption of EPA and DHA omega-3 fatty acids may reduce the risk ofcoronary heart disease. NOW DHA-500 has twice the DHA (500 mg per softgel) asin our regular strength product (250 mg per softgel). This natural fish oilconcentrate is manufactured under strict quality control standards. It istested to be free of potentially harmful levels of contaminants such as PCBs,dioxins, mercury and other heavy metals. Those who experience nausea or refluxfrom other fish oils should find this entericcoated, odor-controlled softgeleasier to tolerate.