Here is an update about omega-3 supplementation:
For a bit of background on omega-3 supplementation, see my other posts about this:
A meta-analysis from 2012 and some ensuing discussion has led to a few more recommendations (see http://www.ncbi.nlm.nih.gov/pubmed/22488258):
1) acute beneficial effects for mood may be present only for more severe symptoms. However, I am curious about the preventative effects from continuous supplementation over a period of years; the data does not give us a clear answer about this yet.
2) the EPA dose may need to be as high as 4 grams per day, certainly much higher than the 1 gram per day range frequently used in some of the studies.