Omega-3, also called ?-3 fatty acids or n-3 fatty acids, are polyunsaturated fatty acids (PUFAs) with a double bond (C=C) at the third carbon atom from the end of the carbon chain. Three types of omega-3 PUFA involved in human physiology are ?-linolenic acid (ALA) (found in plant oils), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) (both commonly found in marine oils). They are considered essential fatty acids and necessary for human health but the body can
