DHA (docosahexaenoic acid) is an omega-3 fatty acid from the meat of cold-water fish. DHA supplements support mental and nervous system function and promote cardiovascular health. DHA is also often used in supplements for babies since it is naturally found in breast milk. If you want to supplement DHA fish oil in your diet, look no further than Swanson. Swanson offers some of the best cruelty free, gluten free, non-GMO, vegan and vegetarian formulas available via capsules, liquid, softgels and more.