Enteric Coated To Avoid Upset Stomach, Aftertaste & Reflux! Supportive but not conclusive research shows that consumption of EPA and DHA omega-3 fatty acids may reduce the risk of coronary heart disease. One serving of 21st Century’s Fish Oil provides 300 mg of EPA and DHA omega-3 fatty acids. These omega-3 fatty acids help maintain cholesterol levels which are within normal range. 21st Century’s Fish Oil contains the highest quality molecularly distilled fish oil concentrate.