We've gathered together just a small selection of the relevant scientific research and studies into the effects of Omega-3.

Wang, C, Harris, W.S., Chung, M., Lichtenstein, A.H., Balk, E.M., Kupelnick, B., Jordan, H.S.& Lau, J. 2006. "n-3 fatty acids from fish or fish-oil supplements, but not alpha-linolenic acid, benefit cardiovascular disease outcomes in primary- and secondary studies: A systematic review." American Journal Clinical Nutrition 84 (1): 5-17.
http://www.ajcn.org/cgi/content/full/84/1/5

Konig, A., Bouzan, C., Cohen, J.T., Connor, W.T., Kris-Etherton, PM., Gray, G.M., Lawrence, R.S, Savitz, D.A& Teutch, S.M. 2005. "A quantative analysis of fish consumption and coronary disease mortality. Am. J. Prev. Med. 29 (4): 335-346.
http://linkinghub.elsevier.com/retrieve/pii/S0749379705002515

Harris, W.S. & Von Schacky, C. 2004. "The omega-3 index: a new risk factor from coronary heart disease?" Prev. Med. 39 (1): 212-220.
http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&
list_uids=15208005&dopt=AbstractPlus

1999. Dietary supplementation with n-3 polyunsaturated fatty acids and vitamin E after myocardial infarction: result of the GISSI-Prevenzione trial. Gruppo Italiano per lo Studio della Sopravvivenza nell'Infarto miocardico. Lancet. 354 (9177): 447-55.
http://www.ncbi.nlm.nih.gov/pubmed/10465168

Morris, M.C., Sacks, F. & Rosner, B. 1993."Does fish oil lower blood pressure? A meta-analysis of controlled trials." Circulation. 88 (2) 523-533.
http://circ.ahajournals.org/cgi/content/abstract/circulationaha;88/2/523

Dyberg, J. & Bang, H.O. 1979. Lipid metabolism, atherogenesis, and haemostasis in Eskimos: the role of the prostaglandin-3 family. Haemostasis. 8 (2-5): 227-33.
http://www.ncbi.nlm.nih.gov/pubmed/511010

Fortin, P.R., Lew, R.A., Liang, M.H., Wright, E.A., Beckett, L.A., Chalmers, T.C., & Sperlin, R.I. 1995. Validation of a meta-analysis the effects of fish oil in rheumatoid arthiritis. J.Clin. Epidermiol. 49 (11): 1379-1390.
http://www.ingentaconnect.com/content/els/08954356/1995/00000048/00000011/art00028

Kremer, J.M., Lawrence, D.A., Petrillo, G.F., litts, L.L., Muallaly, P.M., Rynes, R.I., Stocker, R.P., Parhami, N., Greenstein, N.S., Fuchs, B.R., et al. 1995. Effect of high-dose fish oil in rheumatoid arthritis after stopping nosterioidal anti-inflammatory drugs. Clinical and immune correlates. Arthritis Rheum. 38 (8): 1107-1114.
http://www.ncbi.nlm.nih.gov/pubmed/7639807

Rennie, K.L., Hughes, J., Lang, R. & jegg, S.A. 2003. Nutritional management of rheumatoid arthritis: A review of the evidence. J.Hum. Nutr. Diet. 16(2):97-109.
http://www.ingentaconnect.com/content/bsc/jhnd/2003/00000016/00000002/art00007

Tanskanen, A., Hibbbeln, J.R., Tuomilehto, J., Uutela, A., Haukkala, A., Viinamaki, H., Lehtonen, J. & Vartiainen, E. 2001. Fish Consumption and depressive symptoms in the general population in Finland. Psyciatr. Ser. 52 (4): 529-531.
http://ps.psychiatryonline.org/cgi/content/full/52/4/529

Sy K.P., Huang, S.Y., Chiu, C.C. & Shen, W.W. 2003. Omega-3 fatty acids in major depressive disorder. A preliminary double-blind, placebo-controlled trial. Eur.Neuropsychopharmacol. 13 (4): 267-271.
http://www.ncbi.nlm.nih.gov/pubmed/12888186?ordinalpos=1&
itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum

Nemets, H., Nemets, B., Apter, A. Bracha, Z. &Belmaker, R.H. 2006. Omega-3 treatment of childhood depression: a controlled, double-blind pilot study. Am. J. Psychiatry. 163 (6)> 1098-1100.
http://ajp.psychiatryonline.org/cgi/content/abstract/163/6/1098

Parker, G., Gibson, N.A., Brochiew, H., Heruc, G., Rees, A.M., & Hdzi-pavlovic, D. 2006. Omega-3 fatty acids and mood disorder. Am. J. Psychiatry. 163 (6): 969-978.
http://ajp.psychiatryonline.org/cgi/content/abstract/163/6/969

Sublette, M.E., Hibbeln, J.R., Glfalvy, H., Oguendo, M.A. & Mann, J.J. 2006. Omega-3 polyunsaturated essential fatty acid status as a predictor of future suicide risk. Am. J. Psychiatry. 163 (6): 1100-1102.
http://www.ncbi.nlm.nih.gov/pubmed/16741213

Dunstan JA, Simmer K, Dixon G et al. Cognitive assessment of children at age 2 1/2 years after maternal fish oil supplementation in pregnancy: a Randomized controlled trial. Arch Dis Child Fetal Neonatal Ed; doi 10.1136/adc.2006.099085.
http://lib.bioinfo.pl/pmid:17185423

Helland IB, Smith L, Saarem K et al. Maternal supplementation with very-long-chain n-3 fatty acids during pregnancy and lactation augments children's IQ at 4 years of age. Pediatrics 2003; 111: e39 - 44.
http://pediatrics.aappublications.org/cgi/content/full/111/1/e39

Birch EE, Garfield S, Hoffman DR, Uauy R, Birch DG. Developmental Medicine & Child Neurology. 2000, 42: 174-181. Mental Development and Long-chain Polyunsaturates in Term Infants.
http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=2057

Richardson and Montgomery. The Oxford-Durham Study: A randomized Controlled Trial of Dietary Supplementation with Fatty Acids in Children With Developmental Coordination Disorder. Pediatrics 2005; 115,1360-1366.
http://pediatrics.aappublications.org/cgi/content/abstract/115/5/1360

Simonopoulos, A.p. 1991. Omega-3 fatty acids in health and disease and in growth and development. Am. J. Clin. Nutr. 54: 438-463.
http://www.ajcn.org/cgi/content/abstract/54/3/438

Berth-Jones, J. & Graham-Brown, R.A. 1993. Placebo-controlled trial for essential fatty acid supplementation in atopic dermatitis. Lancet (341 88860) 1557-1560.
http://grande.nal.usda.gov/ibids/index.php?mode2=detail&origin=ibids_references&therow=118841

Sies, H.& Stahl, W. 2004. Nutritional protection against skin damage from sunlight. Anu. Rev. Nutr. 24: 173-200.
http://www.ncbi.nlm.nih.gov/pubmed/15189118?ordinalpos=1&itool=EntrezSystem2.
PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVAbstractPlus

Jackson, M.J., McArdle, F., Jones, S.A., McArdle, A. & Rhodes, E.E. 2002. Effect of micronutrient supplement on u.v.-induced skin damage. Proc. Nutr. Soc. 61(2)> 187-189.
http://www.ingentaconnect.com/content/cabi/pns/2002/00000061/00000002/art00005