The amount of fish oil you should take should be based on the EPA and DHA levels in the fish oil, not on the total amount of fish oil.  Most good fish oil supplements will feature 18% EPA and 12% DHA which equals out to 180mg and 120mg respectively in a 1g tablet.  Based on these numbers, here are some dosage guidelines:

  • Adults 18+ with no history of heart disease: 2-3 tablets daily
  • Adults 18+ with coronary heart disease: The AHA (American Heart Association) recommends consuming 1g daily of both EPA and DHA.  This equates to about 5 tablets daily using the numbers above.
  • Adults 18+ with high cholesterol: The AHA recommends consuming 2-4g daily of EPA and DHA.  This equates to 10-20 tablets daily using the numbers above.
  • Children 18 and under: No established dosage for children, please consult a medical professional.

As usual, please consult a medical professional if you are currently taking any other medications.  Fish oil can increase the effectiveness of some medications, like blood thinning medicines.

You can download the complete American Heart Association study here.