A building block for cell membranes, DHA (docosahexaenoic acid, omega-3) is a vitamin-like nutrient vital to mental performance, heart and blood vessel health, vision, immunity, and many other functions. Doctor's Best Vegan DHA from Algae with Life's DHA™ is plant-sourced DHA and prepared from toxin-free, sustainably cultured algae and is suitable for vegans.