DHA is an indispensable material basis for the formation, development and operation of brain cells, which can nourish and strengthen the brain. For some special people, such as infants and pregnant women, fish oil supplementation can promote the brain development of fetuses and infants. The recommended intake during pregnancy and lactation is 300 mg/day. Babies can get DHA from milk. If the mother can't provide it, you can choose DHA supplement, such as fish oil. For the elderly, taking fish oil can improve their cognitive level.
A potential danger of eating fish is that it contains high levels of mercury and other environmental pollutants, such as PCBs. Your reaction should be to choose the size of the fish. That kind of small fish, such as sardines, usually accumulate less toxins because they are at the bottom of the food chain. Avoid large fish such as sharks or swordfish. The bigger the fish, the higher the mercury content. In addition, the mercury content of aquatic shellfish, salmon and silver carp may be relatively low.
If you consider eating fish in local rivers, lakes and streams, you should first check whether there are reports of mercury and other pollutants in these places. Without strict supervision and management, there is a great possibility of serious pollution.
But be wary of false information, such as the purity and freshness of fish oil. Because the study found that fish oil is likely to deteriorate if it is treated for a few days. You should buy high-quality fish oil mixed with antioxidants, such as vitamin E or mixed tocopherol, which can prevent fish oil from going bad. In addition, trusted institutions will also publish their ratings of fish oil products on the market. You should choose fish oil products with high evaluation from these institutions.