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People all know the health benefit of eating fish, many fish can make you smart and healthy. More and more evidence suggests many have cardiovascular protective effects of fish oil. In marine fish liver oil and body oil contains a very valuable highly unsaturated fatty acids, especially fish in Omega -3 fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) prevention of crown The role of heart disease has been clarified, and many freshwater fish are contained in 16 or 18 carbon unsaturated fatty acids, and its role in the effectiveness of natural than the fish. The study found that if patients suffering from myocardial infarction only select low-fat diet high in fiber, then, and should not significantly reduce mortality, but if there is three fish per week, insist more than two years, the mortality rate will drop 29%. 18,000 scientists have hypercholesterolemia in patients with a 5-year study period, patients increase every day give 1800mg of eicosapentaenoic acid, resulting in high cholesterol in patients with coronary risk declined significantly.

Omega -3 fatty acids in view of the role of health care, the American Heart Association recommends that people with coronary heart disease should increase intake of omega -3 fatty acids. You know? You eat, whether natural or wild fish farmed fish, there are heart protective effect, because these two fish contain Omega -3 fatty acids. Even once a week eating only fish, but also to protect the heart, of course, if five times a week to eat fish, the effect will be better.

However, this simple change eating habits can prevent cardiovascular disease by some sense of pleasure about fish contaminated by mercury poisoning can cause central nervous system to suppress the report. If someone stubbornly believe that too much emphasis on mercury poisoning, then you have to make are at a place like Einstein brightest short-lived as people live longer or make a stupid fool to make a choice between a.

What is truth? Fish safe? Fish can cause mercury poisoning true? Let us look at the fish come from the mercury, on human health may be affected.

Waste or coal combustion trace of mercury, industrial or domestic refuse will also contain some mercury, and mercury through the air, soil, water entering the rivers, eventually into the ocean. Mercury in marine biology has been minimal uptake in the body after being converted into methylmercury, methylmercury will then, through micro-biology - fish - big fish, such a food chain enrichment to keep big fish in vivo. Because methylmercury is not a fat-soluble substances, like dioxin, it will not remain in the adipose tissue. Methylmercury has a strong neurotoxicity, Iraq had occurred with methylmercury ate bread appeared mentally retarded babies, epilepsy, microcephaly poisoning case, the investigation by experts found that these bread has been mixed with methyl mercury fungal agent to kill polluted.

Methylmercury content of fish food into the body as already contains the amount of methylmercury in fish increased. There is no meat-eating habits of fish, such as sardines, salmon and shrimp on the very low levels of methyl mercury in vivo. Conversely, those who eat the small fish of the fish, such as sharks, tuna, swordfish on the body may contain more methylmercury. It is interesting that many were defamatory farmed fish methylmercury at least, this may be because farmed fish to feed the main, do not eat or eat less fish, coupled with a short growth cycle, the body can not Enrichment substantial methylmercury, the methylmercury content of meat naturally low. The introduction of the discovery of even more amazing is that even though in itself has a strong methylmercury neurotoxicity, but methylmercury in fish in vivo and cysteine usually combine this combination of toxic substances after only methylmercury toxicity one-tenth.

Well, the past has not resulted in fish methylmercury poisoning examples? Are not the fish will certainly poisoning?

In the Faroe Islands, scientists have on the local-born babies were 14 years of observation, by checking that every day they eat pilot whale meat mothers of infants born to nervous system development, found that children of mothers before the intake of methylmercury quantity and the infant nervous system dysplasia There is a clear link. In contrast, in the Seychelles Islands on the women have 12 meals a week are eating fish, but they birth the baby well-developed nervous system and found no problems, even though the residents of this island, including the baby hair on methylmercury content residents of the United States higher than 10-20 times. And fish around the island contained in the body of methylmercury content in fish is similar to the United States waters are between 0.05-0.25ppm, so residents of the Seychelles Islands in vivo with higher levels of methylmercury reason is because they eat American more than the fish. However, methyl mercury content of pilot whale in vivo is 10 times the other fish to 1.6ppm. Obviously, the result of Faroe Islands and Seychelles Islands infant differences in nervous system development because the residents of the Faroe Islands intake more methylmercury because they eat whales, mammals, not fish. Note that the content of mercury in hair to achieve 50ppm may occur when poisoning. Seychelles Islands residents ate 12 meals per week of fish, but they average hair mercury content of only 6.8ppm.

We should be eating fish吗? How to eat safely?

There is no doubt that methylmercury is toxic, but not all fish contain a sufficient quantity of poisoning, the majority of low levels of methylmercury in fish, usually small number of fish a week more than 12 times, while the Cypriot Tongue Islands residents have 12 meals a week of them eating fish, but they did not appear methylmercury poisoning.Shows that fish are safe, the premise is to eat science, eat reasonable. Those who try to eat the cleaner fish, such as sardines, salmon and shrimp, do not eat or eat less high-pollution of marine mammals, it will greatly reduce the possibility of methyl mercury poisoning.

Fish other potential pollutants such as dioxins and PCBs increases the risk of cancer. But the scientists of these pollutants may be associated with carcinogenic Omega -3 fatty acids to human health benefits are compared, by comparison, they think fish content of dioxins and PCBs are very low, on health the potential impact of small, far less Omega -3 fatty acids give people the benefits of big.

American Medical Association cautiously suggested that pregnant women should be strictly limited to high methylmercury contamination of fish (such as sharks, tuna, swordfish) intake every two weeks up to the second, but a week to eat 2-3 meals other fish (such as sardines, salmon, shrimp). Most people eat one meal a week of shark, tuna, swordfish, 2-3 meals of other fish. In North America, people enjoy the credit of wild or farmed salmon, it can achieve the purpose of reducing risk of heart disease, but also to avoid methylmercury poisoning are worthy of being called an ideal choice. Because whether it is wild or farmed fish Malaysia methotrexate, are equally rich in Omega -3 fatty acids, and low levels of methylmercury. Of course, if you sure you want to insist methylmercury pollution in the concept of zero, then only to give up eating fish, and artificial selection of fish oil extraction and purification products.