Alpha-linolenic (ALA) acid is a type of omega-3 fatty acid found in plants. It is similar to the omega-3 fatty acids in algal oil, called eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). Your body can change alpha-linolenic acid into EPA and DHA. Alpha-linolenic acid is also found in flaxseed oil, hemp oil, marine phytoplankton, AFA Algae (Aphanizomenon flos-aquae), chia seed and walnuts, to name a few sources. These are all good sources of this important nutrient.