Essential fatty acid supplements are used to provide the body with essential fatty acids (EFAs) that cannot be produced by the body and must be obtained through the diet or supplements. The two primary types of essential fatty acids are omega-3 fatty acids and omega-6 fatty acids.

Omega-3 fatty acids, specifically eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are important for various aspects of health. Here are some reasons why people may use essential fatty acid supplements: heart health, brain function, eye health, inflammation and immune system support, as well as in pregnancy for infant support and development.