The majority of fish oil takers obtain only a fraction of an optimal dose because they do what is shown on the bottles label. When taking a food grade quality fish oil supplements you need to take anywhere from 5-10 capsules of fish oil every day to achieve the best amount.
Pharmaceutical grade fish oil capsules like that by Doctor's Holistic Rx contain a higher amount of omega 3 fatty acids. You only have to take 2 capsules of pharmaceutical grade fish oil every day to get the best amount of omega 3 fatty acids.
http://www.amazon.com/Doctors-Holistic-Rx-Pharmaceutical-Distillation/dp/B00KKSELFC
http://www.wat.tv/video/12546885