From about...2004 until late 2005/early 2006, I was massively depressed. My wife had left me, and I was in such a state that...well, I cried from the first thing in the morning until I went to sleep for about the first six months, then felt relieved when I only cried once a day the remaining 18 months of the ordeal. I was always bipolar (ask my wife), but...this was bad even for me.
Around this time (late 2005) I committed a very violent act that made me buckle down and start looking at treatments. I was either going to kill myself or someone else if something didn't give. Reading on-line, I discovered Harvard research that suggested a link between Omega 3 fatty acids and depression. In the study, people were given 9.6 grams of Omega 3s a day, and began showing marked improvement in mood.
I read and read...so many people were getting turned on to this as a natural cure after being put on so many medications, and the vast majority of them were getting better. Well hell. I had nothing to lose.
Nothing happened the first week or two, taking 1 gram of Omega 3s a day. I was still the same cranky, suicidal bastard I always was. I upped my dosage to two grams. Within a couple days, things slowly began to change. After a week, I felt better than I had in a long time. I still hated my life because it was shit, but I didn't want to kill myself over it. Wow.
By the time I met up with my ex-wife at a restaurant a year and some months later (a week after our divorce, no less), she said I was a completely different person, and I am. Before, she had to worry which version of me was going to walk through the door. Now, she knows I'm going to be steady and wonderful, like usual.
Imagine her chagrin that I became the person she always thought I could be while we were apart. She wasn't too happy with herself about that. lol
So, in summation: I don't think Omega 3s are a miracle cure, but I do think they alleviate symptoms so you can deal with the problems in your life that are getting you caught up in a depression cycle.
Also, they don't deal with the manic side of my bipolarity completely. No, I don't get so amped up that I can't think anymore; however, there are days where I'm a little wacky. It's not unpleasant, really. It's just sometimes I'm a little...rambunctious.
It's something to think about, if you're going through a bout of depression. It may not work on situational depression but, at least for me, it worked on chemical depression.
Just something I wanted to pass on to you good folks.