An average dosage recommendation is 1 teaspoon of cod liver oil for every 50lbs of body weight daily. Cod liver oil contains vit D, so if you reside in a sunny climate year round and spend a fair amount of time outdoors you can substitute fish oil for cod liver oil. Keep in mind that this is not part of the Colon Cleanse and is beneficial on an ongoing basis (not just while cleansing). Take the oil at least an HOUR before or after the p&b.