Fish oil is oil obtained from the fat-rich deep-sea fish (salmon, mackerel, sardines, etc.). These fish oils are rich in nutrients such as Omega-3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), all of which have been proven to be beneficial to human health. 

EPA and DHA can significantly reduce blood lipid, promote brain nervous system development, reduce cancer risk factors and regulate immune function.

The reason why some experts suggest that we should supplement fish oil is that although omega-3 fatty acids have many benefits for human health, we can't produce them by ourselves, so we need to supplement them with food. However, due to the dietary structure, the source of omega-3 fatty acids in our daily diet is very limited.

According to a statistic, the omega-3 fatty acids in the diet of ordinary people are only 30-50 mg, and the content of omega-3 fatty acids in the foods they often eat is even less than 1%. This is a long way from the WHO dietary guidelines, which recommend that omega-3 fatty acids be ingested 250-2000 mg/day.

Therefore, fish oil as a natural omega-3 dietary supplement is a good choice. In addition, fish oil is also rich in a variety of fat soluble vitamins, mainly vitamin A, vitamin D and vitamin E. 

But does everyone need fish oil? In the next article, we will explore this issue.

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