PT - JOURNAL ARTICLE AU - B M Yashodhara AU - S Umakanth AU - J M Pappachan AU - S K Bhat AU - R Kamath AU - B H Choo TI - Omega-3 fatty acids: a comprehensive review of their role in health and disease AID - 10.1136/pgmj.2008.073338 DP - 2009 Feb 01 TA - Postgraduate Medical Journal PG - 84--90 VI - 85 IP - 1000 4099 - http://pmj.bmj.com/content/85/1000/84.short 4100 - http://pmj.bmj.com/content/85/1000/84.full SO - Postgrad Med J2009 Feb 01; 85 AB - Omega-3 fatty acids (ω-3 FAs) are essential fatty acids with diverse biological effects in human health and disease. Reduced cardiovascular morbidity and mortality is a well-established benefit of their intake. Dietary supplementation may also benefit patients with dyslipidaemia, atherosclerosis, hypertension, diabetes mellitus, metabolic syndrome, obesity, inflammatory diseases, neurological/ neuropsychiatric disorders and eye diseases. Consumption of ω-3 FAs during pregnancy reduces the risk of premature birth and improves intellectual development of the fetus. Fish, fish oils and some vegetable oils are rich sources of ω-3 FAs. According to the UK Scientific Advisory Committee on Nutrition guidelines (2004), a healthy adult should consume a minimum of two portions of fish a week to obtain the health benefit. This review outlines the health implications, dietary sources, deficiency states and recommended allowances of ω-3 FAs in relation to human nutrition.