What is Doctor’s Best Vegetarian DHA from Algae? Doctor’s Best Vegetarian DHA from Algae is essential for healthy brain, eye, and heart development. It supplies highly concentrated omega-3 DHA (docosahexaenoic acid), prepared from sustainably cultured algae (Schizochytrium sp.). This vitamin-like nutrient and its metabolic derivatives are vital to mental performance, heart and blood vessel health, vision, immunity, and many other functions. DHA’s fundamental importance for health is primarily as a building block for cell membrane systems. How does it work? DHA has been shown to supports the brain in a number of ways. DHA helps regulate genes that manage brain development, maturation, and maintenance. It promotes nerve cell maturation and new nerve cell extensions. DHA improves synaptic membrane fluidity, often in combination with PS (phosphatidylserine) and increases brain production of the protective BDNF (brain-derived neurotrophic factor). It also upregulates glutathione peroxidase, along with other protective antioxidant enzymes and is a source for docosanoids, which promote healthy tissue maintenance. DHA is a primary structural component of the human brain and cerebral cortex.