Natural Factors Extra Strength RxOmega-3 - Bonus Size - A highly concentrated form of omega-3 fatty acids extracted from a safe, pure source. Each dose provides an optimal 2:1 ratio of EPA to DHA that supports cardiovascular and cognitive health, brain function, and reduced symptoms of rheumatoid arthritis. RxOmega-3 is made from cold-water anchovy, sardine and/or mackerel oils, which are two of the best natural sources of EPA and DHA. The pharmaceutical-grade fish oil concentrate ensures that it is free from lipid peroxides and environmental pollutants, such as heavy metals, pesticides, dioxins, and PCBs. RxOmega-3 Enteripure softgels offer targeted delivery using a technology that embeds pure and natural ingredients into the softgel casing to prevent them from breaking down in the stomach, ensuring no fishy aftertaste.