DHA, the main component of fish oil, can be used by teenagers, middle-aged people and the elderly. It is generally believed that 200mgDHA is enough for ordinary adults (people who don't eat fish a day 1g fish oil), and fish oil within 3 g a day is safe. Not suitable for babies.

Liver disease (increased bleeding), fish and seafood allergy, AIDS, high-dose fish oil may reduce immune response (people with already weak immune system should be alert), diabetes (high-dose fish oil may affect blood sugar stability), hypertension (individuals taking antihypertensive drugs may have hypotension).

Fatty fish rich in omega-3 fatty acids include mackerel, tuna, salmon, sturgeon, anchovies, sardines, herring and trout. Among them, about 1gω-3 fatty acids can be obtained every 22 pairs (the actual situation will fluctuate greatly, and this value is for reference only).

Because there are too many omega-6 fatty acids in China's diet, we should pay more attention to the intake of omega-3 fatty acids. Because fish oil is easy to oxidize, eating fish is more efficient than eating preparations.

Dietary Guidelines for China Residents suggest that ordinary adults should eat 75-100g of fish and shrimp every day. However, considering the enrichment of heavy metals and environmental hormones in fish, it is suggested that eat small fish, such as salmon, has less pollution than sharks.

References:

Baidu encyclopedia-fish oil