Studies suggest omega-3 fatty acids may play a role in preventing and managing depression.
The best forms of omega-3 are EPA (eicosapentaenoic acid) y DHA (docosahexaenoic acid), naturally found in oily fish (i.e. salmon, sardines, mackerel, trout, herring and tuna), shellfish and marine algae.
It is good to know that ALA (alpha linolenic acid), found in plant sources (i.e. walnuts, flaxseeds and chia seeds), although it is an omega-3 fatty acid, it has to be converted to EPA and DHA for our bodies to be able to utilize it. Unfortunately the conversion of ALA to EPA and DHA is extremely low (approximately 6% for EPA and 3.8% for DHA).
Does this mean we should only eat marine sources of omega-3? Not at all. Plant sources of omega-3 can be part of a healthy diet in addition to eating 2 servings of oily fish per week, as recommended by the American Heart Association (AHA). Because omega-3 are good for your brain and great for your heart!