Most fish oil consumers get only a fraction of an optimal dose because they just take what is shown on the label of the bottle. With food grade fish oil you need to take between 5-10 capsules of fish oil on a daily basis to get the optimal dose.

Pharmaceutical grade fish oil products like that from Doctor's Holistic Rx contain a much higher concentration of omega 3 fats. You need to take just two 1000 mg capsules of pharmaceutical grade fish oil on a daily basis to get the optimal dose of omega 3 fats.
http://www.amazon.com/Doctors-Holistic-Rx-Pharmaceutical-Distillation/dp/B00KKSELFC
http://www.dailymotion.com/video/x2ur57j