Most people taking fish oil supplements are getting a small percentage of an optimal dose because they do what is shown on the label of the bottle. For a food grade quality fish oil supplements you need to take anywhere from 5-10 capsules of fish oil daily to achieve the optimal amount.
Pharmaceutical grade fish oil products such as those from Doctor's Holistic Rx contain a higher amount of omega 3's. You need to take just 2 capsules of pharmaceutical grade fish oil daily to get the optimal amount of omega 3's.
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