When it comes to omega-3, the advantage of fish oil over flax seed oil is that fish oil is a direct source of EPA and DHA while the ALA in flax seed oil must be converted by the body to EPA and DHA. This conversion is somewhat slow and can be inhibited by lifestyle and other influences.
Research shows that only about 5% of ALA converts to EPA and only up to 3% converts to DHA, if at all.many factors can limit the ALA to EPA and DHA conversion including trans-fatty acids found in many fast foods and baked goods, alcohol intake, certain health conditions, and vitamin and mineral deficiencies, so fish oil is a more dependable source
Research shows that only about 5% of ALA converts to EPA and only up to 3% converts to DHA, if at all.many factors can limit the ALA to EPA and DHA conversion including trans-fatty acids found in many fast foods and baked goods, alcohol intake, certain health conditions, and vitamin and mineral deficiencies, so fish oil is a more dependable source