Where does the fish oil in Omega 3 capsules come from? The fish oil in our Omega 3 capsules comes from fish such as herring (anchovy) and mackerel. Related articles Why is my product clumpy? What should I do if it doesn't dissolve properly? Why is the packaging larger than necessary for the product? Why are tablets and capsules of different sizes in the same-sized box? Are the products free from doping substances? What is K2Vital?