Omega-3 fatty acids are an important part of the diet and are divided up into alpha-linolenic acid, docosahexaenoic acid and eicosapentaenoic acid, reports Mayo Clinic. Daily doses of 0.8-1.1 grams of ALA and 0.3-0.5 grams of both EPA and DHA are recommended by the World Health Organisation.
Omega-3 fatty acids are essential for human health and development; deficiency is thought to be a key factor in many illnesses, says WebMD. It has been shown that Omega-3 supplementation in the form of fish oil can be beneficial to the heart and circulatory systems, according to Mayo Clinic. Promise has been shown in studies using fish oil to help treat cancer, asthma and depression, says WebMD.