It looks like the focus is bipolar depression, and not for the stabilizing of our mood. The following excerpt from that book the article referenced on bipolar is worth noting.

“Because nutritional supplements cannot be patented, there is no large industrial base of support for research on these compounds. . . clinical research thus far, while not definitive, has yielded some encouraging results . . . about the addition of omega-3 fatty acids [fish oil].”

Some questions of mine would be how significant would be the effect on bipolar depression? I find the supplements that work are much too weak for them to be of practical benefit. A case in point is St Johns Wort. This leads up to the question how much does one need to take before the effect is noticeable? I have taken a higher dose of fish oil for over a half a year with no apparent effect. Maybe it helps some people and not others? This may still work for you.

Good luck with the fish oil.