1, tuna
The mercury content in tuna is also in a high range. If it is canned, you can eat it 1-2 times a week, and fresh tuna should not exceed 1 time a week.
2. Tilapia
Tilapia is a fish with a long life cycle, and its mercury content is higher than other fish. And tilapia is a large-scale cultured fish, so it is best not to give it to your baby.
3. Swordfish
Carnivorous fish such as swordfish tend to concentrate a pollutant called methylmercury because they are at the end of the food chain. The substance will appear naturally or occasionally in the environment. Although methylmercury changes with the environment, its content in carnivorous fish is relatively high. The central nervous system of young infants will show a specific poisoning reaction to this mercury derivative.
Extended data:
Eating fish promotes brain development;
1, fish head, fish eye and fish fat also contain an important unsaturated fatty acid DHA, which has a very obvious effect on strengthening the brain and improving intelligence. The number of brain cells reached14 billion soon after the baby was born, and the number and volume of brain cells did not increase after that. From the brain weight of 400g at birth to1400g in adults, axons and dendrites connecting nerve cells are added, and these processes form dense omentum between the brain nerves, and these omentum are mainly composed of lipids.
2. The human body cannot synthesize DHA by itself, but can only obtain it from food. However, the general animal and plant foods almost do not contain DHA, and only eating fish can directly and effectively absorb DHA. The increase of DHA value in the brain can promote the axon growth of nerve cells, strengthen the transmission function of neurotransmitters and activate brain nerve cells, thus enhancing intelligence.
School-age is the period when brain cells of children and adolescents are stimulated, which makes brain synapses grow continuously. At this time, if there is not enough DHA, this growth cannot be completed. Children who absorb a lot of DHA from breast milk have relatively strong memories. Especially for children and teenagers who have been eating fish regularly since weaning, their IQ is relatively high.
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