Description: Docosahexaenoic acid (DHA) is a long-chain unsaturated fatty acid that is a member of the omega-3 family of fatty acids. DHA plays an important role in brain and retinal development in infants. It is also the most abundant unsaturated fatty acid found in the brain. It can be found in the flesh of cold-water fish, including mackerel, tuna, halibut, salmon, cod liver, whale blubber, and seal blubber.