In the recent AMA conference I attended (American Med Assoc) on nutrition, there were blocks devoted exclusively to Omega 3's with specific regard to FISH OIL since they have the longest chain Omega 3's and therefore more effective with relieving ADD, Depression, Behavioral problems and a multitude of other things.
Specifically with regards to ADD - you need a fish oil that is PHARMACEUTICAL GRADE - I can't stress that enough - it has to be 99.9% of what it says it is. You can't buy those at Walmart or GNC. Also with the pharm grade - it is totally distilled and it must be COLD PRESSED with the distillation and detoxification - if it is not cold pressed it is absolutely worthless because it destroys the properties. It ALSO must have the correct ratio of EPA to DHA - which is 1:1 - and FISH OIL which has the long chain fatty acids, has the ideal ratio - so fastest results and most effective results.
In the numerous studies we saw, the ADD meds and the fish oils had almost exactly the SAME effectiveness with NONE of the side effects (suicidal thoughts, depressions, etc). I have FISH oil on my website that I refer pregnant and postpartum women to - as they should all be taking fish oil (fetal brain development, recooperation after birth with Omega 3 depletion which often leads to postpartum depression, etc).
The site is www.herbal-nutrition.com/bonniewayne/ and it is called Herbalifeline. It is one of the highlighted products on the front page. This one is Pharmeceutical grade, cold pressed, detoxified (no contaminants) and distilled properly.
Also I would strongly recommend educating yourself on the topic. There are a couple of books you can get on Amazon that go into ADD, Fish oils, and the brain. The first is "The Crazymakers" (How the fast food industry is destroying our children's brains).
Also, "The Omega 3 Connection" is VERY VERY excellent, as is "Omega Zone." If I could recommend two first - it would be the Omega 3 connection and then the CrazyMakers.
You can also google studies with ADD and ADHD and Fish oil. Just type in ADD ADHD FiSh Oil and STUDIES - you will find thousands of studies. The reason they are not promoted as much by doctors is simple - there are no drug reps promoting them from drug companies - they only do their OWN big drugs - and the drug companies who fund continuing education for docs promote their own products. It gets into a whole other ball of wax but you get the idea. If you can find a doctor that is open to working with you on a more holistic approach that would be your best bet. Good luck!!!!