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. br br 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.