The bad news: DHA deficiency has been shown to increase the risk for the development of cardiovascular disease and age-related cognitive decline. DHA stands for docosahexaenoic acid, and is an omega-3 fatty acid that is essential for proper human development and health. Notably, it plays critical roles in heart, eye and brain function. Unfortunately recent shortages in oily fish supplies have led to a decline in the DHA content of fish that we find commonly in our grocery stores. Because fish is the most prominent source of DHA in the human diet, DHA intake concerns are nothing new.