These Solgar 1000 mg fish oil concentrate softgels provide Omega-3 rich EPA and DHA; These essential fatty acids cannot be made by the body. Omega 3 contributes to vision and heart function; Also supports cardiovascular, joint, and metabolic health. Tested For Optimum Purity; Sourced from deep-sea, cold-water fish Solgar Omega 3 Fish Oil Concentrate 1000 mg softgels are purified via molecular distillation to remove mercury and other environmental impurities.