NKO Neptune Krill Oil 500 mg, 120 Softgels, Source NaturalsSource Naturals NKO Neptune Krill Oil Supports Heart Health & Cell Membrane Integrity. 500 mg Softgels. NKO is an extract from Antarctic krill that is rich in cell membrane building blocks: highly unsaturated phospholipids co functionalized with omega 3 fatty acids (EPA & DHA). Although beneficial for both men and women, NKO also supports temporary relief of PMS symptoms. Supplement Facts Serving Size: 2 Softgels Amount %DV Calories 10 Calories from