Fish oil vs krill oil?

When comparing fish oil and krill oil, there are notable differences, particularly in the bioavailability and recommended dosages. Krill oil, despite having the beneficial DHA in a phospholipid form which is more bioavailable, is typically available in very low doses. Consequently, achieving sufficient omega-3 intake (e.g., 2 grams) from krill oil supplements is challenging due to their low dosage levels. Furthermore, krill oil supplements are often reported to be rancid, which can be a concern for consumers 1.

On the other hand, fish oil supplements varied in quality and form can be more effective if chosen carefully. High-quality fish oil supplements are generally in triglyceride form, making them more bioavailable than those in ethyl ester form. However, it's essential for consumers to ensure they are taking fish oil with food to enhance absorption, especially if the supplement is in ethyl ester form 2.

Overall, while krill oil offers a bioavailable form of DHA, the practical challenges with dosage and freshness make high-quality fish oil supplements generally more reliable when obtaining significant amounts of omega-3 fatty acids.