Most fish oil consumers get a small percentage of a good daily dose because they do what is recommended on the label of the bottle. For a food grade quality fish oil supplements you should take anywhere from 5-10 softgels of fish oil daily to achieve the most healthy quantity.
Pharmaceutical grade fish oil supplements like that from Doctor's Holistic Rx contain a much higher concentration of omega 3's. You can take just 2 capsules of pharmaceutical grade fish oil daily to get the most healthy quantity of omega 3's.
http://www.amazon.com/Doctors-Holistic-Rx-Pharmaceutical-Distillation/dp/B00KKSELFC
http://www.wat.tv/video/12546953