The best alternative is still the conservative method: by eating plenty of fish, such as mackerel, salmon or herring. But as listed in the question “How much omega-3 does fish contain?”, you would need to eat 100 g of herring, 250 g of salmon, or 1.5 kg of trout every day to get enough omega-3 (2 g per day). Another source of omega-3 is flax oil and other plants. However, marine omega-3 fatty acids (EPA/DHA) are considered to have more beneficial properties than plant omega-3 fatty acid (ALA). The human body can only convert a small percentage (0.5 – 10.0%) of ALA into EPA and DHA.