Most fish oil consumers are getting only a fraction of an optimal dose because they just take what is indicated on the label. For food grade fish oil capsules you should take anywhere from 5-10 capsules of fish oil every day to get the optimal quantity. br br Pharmaceutical grade fish oil products such as those 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 optimal quantity of omega 3 fatty acids.