It depends on what you are taking it for and the source. For example, if you are taking it to reduce the risk of heart disease you need to consume two 3-oz. servings of cold-water fish such as salmon, mackerel, halibut, sardines, tuna, and herring each week or take 3 g of fish oil per day. Remember to consult your healthcare provider before you start taking omega-3 because it may interfere with other medications.
