Ultimate Omega-D3 includes exceptionally high concentrations of the omega-3 fatty acids EPA and DHA, plus vitamin D. Ultimate Omega-D3 supports optimal heart and bone health, as well as healthy aging and immune function. Every batch of Nordic Naturals fish oils is third-party tested for environmental toxins, including heavy metals, dioxins, and PCBs. All fish oils used in Nordic Naturals products surpass the strictest international standards for purity and freshness. Certificates of Analysis are available upon request.