This is a research study to determine whether omega-3 fatty acid supplementation, when taken
with the antidepressant medication escitalopram (Lexapro), helps to improve depressive
symptoms in individuals who have major depressive disorder (MDD).
Omega-3 fatty acids are found in foods including walnuts, some fruits and vegetables, and
coldwater fish such as herring, mackerel, sturgeon, and anchovies.