some info-
[In 2007, the dietitians of North America officially recommended 500 mg per day of EPA+DHA for healthy adults. Previously, the American Heart Association in their deitary guidlines recommended 900 mg per day for those with coronary heart disease.]
http://www.dhaomega3.org/FAQ/WHat-is...HA+EPA-per-day
https://examine.com/supplements/fish-oil/
and the sticky thread here has info-
http://neurotalk.psychcentral.com/thread181974.html