Omega-3 fatty acids are an essential nutrient, containing both docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), as well as Alpha Lipoic Acid (ALA). Simply put, they are fat in the blood. And more specifically are the end product of digesting and breaking down fats in our foods. These fatty acids provide the body with energy, with extras being stored in the body and used at a later point. When you need that energy, your body knows to tap into the unused storage, ideally using up extra calories and burning fat.