With multiple omega-3 benefits per serving, plus 1000 IU (25 mcg) of vitamin D3, Ultimate Omega Xtra provides a high concentration of omega-3s to support: heart health brain and mood joint mobility body composition optimal functioning of the immune system At Nordic Naturals, we produce all of our fish oils using fresh, wild-caught fish to deliver omega-3s in triglyceride form for better results. Certified sustainable and always exceeding the strictest purity standards, our award-winning fish oils embody our commitment to the health of people and our oceans.