Nordic Naturals DHA delivers concentrated omega-3 essential fatty acid DHA from fish oil in small, easy-to-swallow soft gels. DHA supports mood, memory, and neurological function. Every batch of Nordic Naturals fish oils is third-part tested for environmental toxins, including heavy metal, dioxins, and PCBs. All fish oils used in Nordic Natural products surpass the strictest international standards for purity and freshness.