A: There are many sources of omega-3′s from both plant and animal sources. These include: krill and krill oil, salmon and other fish, grass-fed beef, omega-3 eggs, walnuts, chia seeds, flaxseeds, pumpkin seeds, kale and squash. Krill oil has been shown to be one of the most beneficial omega-3′s considering the omega-3′s are bound to phospholipids, the same structure as human cells.