Omega3 (Specifically DHA) Fish Oil has so many other benefits its ridiculous. If you are not getting enough (chances are you aren't) you should really add them to your regime.
"... the study linked moderate intake of fish-derived omega-3 DHA to a 20 percent reduced rate of periodontitis.
"Periodontitis is a common, chronic inflammatory disease characterized by gum tissue separation from the tooth – the so-called periodontal “pockets” that can lead to bone and tooth loss."
Naqvi AZ et al. n-3 Fatty Acids and Periodontitis in US Adults. J Am Diet Assoc. 2010 Nov. Volume 110, Issue 11, Pages 1669-1675. doi: 10.1016/j.jada.2010.08.009
Our boy is one month old and my wife has been taking DHA supplements for more than half the pregnancy. I was actually looking at DHA supplements for infants when I came across the above article and it being very recent one caught my interest. It is yet to be seen if DHA makes him smart but as of now we are very happy with the little dude :)
http://www.ncbi.nlm.nih.gov/pubmed/12442909
Western diets are deficient in omega-3 fatty acids, and have excessive amounts of omega-6 fatty acids compared with the diet on which human beings evolved and their genetic patterns were established. Excessive amounts of omega-6 polyunsaturated fatty acids (PUFA) and a very high omega-6/omega-3 ratio, as is found in today's Western diets, promote the pathogenesis of many diseases, including cardiovascular disease, cancer, and inflammatory and autoimmune diseases, whereas increased levels of omega-3 PUFA (a low omega-6/omega-3 ratio) exert suppressive effects. In the secondary prevention of cardiovascular disease, a ratio of 4/1 was associated with a 70% decrease in total mortality. A ratio of 2.5/1 reduced rectal cell proliferation in patients with colorectal cancer, whereas a ratio of 4/1 with the same amount of omega-3 PUFA had no effect. The lower omega-6/omega-3 ratio in women with breast cancer was associated with decreased risk. A ratio of 2-3/1 suppressed inflammation in patients with rheumatoid arthritis, and a ratio of 5/1 had a beneficial effect on patients with asthma, whereas a ratio of 10/1 had adverse consequences.
From wikipedia http://en.wikipedia.org/wiki/Omega-3_fatty_acid "n−3 fatty acids (popularly referred to as ω−3 fatty acids or omega-3 fatty acids)"
so omega-3 is just another name for n-3 fatty acids and on that chart it's just listed as Fish Oil instead.
Now eating a diet with little vegetable oils and opting for grass fed meat, you are able to bring your Omega6 consumption down drastically, which, with some fresh wild caught salmon every now and then will remove the need for you to supplement. But unfortunately, we cant do that all the time, so every now and then its good to take some fishoil.
Anyway some studies:
[1] http://www.ajcn.org/cgi/content/full/70/3/560S
[2] http://www.ncbi.nlm.nih.gov/pubmed/18370801
[3] http://www.ncbi.nlm.nih.gov/pubmed/17607361
[4] http://www.ncbi.nlm.nih.gov/pubmed/18483335?ordinalpos=1&...
If you jump on Pubmed or DailyScience and search for omega3, you will find a plethora of studies.