Most fish oil consumers are getting a small percentage of a good daily dose because they just take what is shown on the label. If you are taking food grade fish oil capsules you should take between five to ten softgels of fish oil every day to obtain the optimal dose.

Pharmaceutical grade fish oil supplements like that from Doctor's Holistic Rx contain a much higher concentration of omega 3 fatty acids. You only have to take 2 softgels of pharmaceutical grade fish oil every day to get the optimal dose of omega 3 fatty acids.
http://www.amazon.com/Doctors-Holistic-Rx-Pharmaceutical-Distillation/dp/B00KKSELFC
http://www.wat.tv/video/12547123