Fish oil is the general name of all oily substances in fish, including body oil, liver oil and brain oil. Fish oil is a natural healthy food, which is derived from the fat extract of deep-sea fish. Its components are polyunsaturated fatty acids, saturated fatty acids and fat-soluble vitamins. The most effective polyunsaturated fatty acid-ω-3 unsaturated fatty acid, which is rich in EPA and DHA, can reduce low density lipoprotein (low density lipoprotein cholesterol) in human blood and reduce blood viscosity. It can prevent atherosclerosis and cardiovascular and cerebrovascular diseases, so the most essential component in fish oil is omega-3 unsaturated fatty acid. Omega-3 unsaturated fatty acids are also essential fatty acids that the human body cannot synthesize, so we need to strengthen our intake in our daily diet.
The international "fish oil fever" began in the mid-1980s. According to a survey published by the Swedish Academy of Royal Science in the late 1970s, Eskimos living near the Arctic Circle eat seals and fish all the year round and seldom eat fresh vegetables, but strangely, the incidence of cardiovascular diseases among Eskimos is ten times lower than that of neighboring Danes! According to scientists' speculation, this is probably related to the fact that Danes prefer beef to fish, while Eskimos prefer marine fish. Subsequently, Swedish and Dutch scholars confirmed through experiments that a series of long-chain unsaturated fatty acids in cold-water marine fish have significant preventive effects on cardiovascular diseases. Since then, "fish oil" has become a popular healthy food in the international market.
In recent years, with the in-depth study of ω-3 unsaturated fatty acid, the most effective component in fish oil in European and American markets, some universal functions of ω-3 have been gradually discovered, such as preventing cardiovascular and cerebrovascular diseases, fighting inflammatory reaction (arthritis), improving mood, resisting depression and improving memory.
It should be noted that only taking high-purity fish oil is effective. Low purity fish oil is not only ineffective, but also harmful.