Fish fat contains -3(omega 3-3) fatty acids, which can protect the nervous system and help to strengthen the brain. Studies show that people who eat fish at least once a week, especially salmon, sardines and herring, have a much lower incidence of Alzheimer's disease than those who seldom eat fish. Eating fish also helps to strengthen the activity of nerve cells, thus improving the ability of learning and memory.

However, both wild and natural organic agriculture are beneficial to human body; But they are not raised in feed, and they will contain many pollutants harmful to health.

But this kind of harm is not great and can be considered harmless.