Japanese diet rich in fish may enter into the mystery of the heart healthy omega-3 fatty acids, found in fish, it appears to prevent hardening of the arteries.
If you are trying to extract ways to reduce the risk of heart disease, you can start with a diet rich in seafood, which is commonplace in Japan. According to new research, constantly eating tuna, sardines, salmon and other fish protect Japanese men against clogged arteries, despite other risk factors for cardiovascular system.
Japan vs USA
The study, published August 5, 2008 issue of the journal of the American College of Cardiology (JACC) suggests that the protection comes from omega-3 fatty acids, which are found in abundance in oily fish. In the first international study of its kind, researchers found that, compared with older white men or Japanese-Americans living in the United States, in the blood of Japanese men living in Japan, levels of omega-3 fatty acids twice - this discovery was is independently associated with a low level of atherosclerosis.
Mortality from coronary heart disease in Japan has always been surprisingly low. The study shows that very low rates of coronary heart disease among Japanese living in Japan may be due to the constant use of the fish.
Japanese eat about 85 grams of fish daily, on average, while typical Americans eat fish perhaps twice a week. Nutritional studies indicate that the use of omega-3 fatty acids contained in fish, the average is 1, 3 grams per day in Japan, compared with 0, 2 grams per day in the United States.
Earlier studies showed that Japanese men had significantly lower levels of cholesterol accumulated in the arteries than white men living in the United States - despite similar rates of blood cholesterol and blood pressure
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Similar rates of diabetes
Diabetes - threatening and incurable disease
and a much higher level of cigarette smoking. It is unclear, however, whether Japanese men to help the strongest genes, diet high in fish or any other factor.
ERA JUMP study
To answer this question, the study ERA JUMP (Electron-beam tomography, evaluation of risk factors among Japanese and American men born in the period after World War II) included 868 randomly selected men aged 40 to 49 years. Of these, 281 were Japanese men of Kusatsu, Shiga, Japan; 306 were white men from Ollegeni County, Pennsylvania, and 281 were third- or fourth-generation Japanese-American men from Honolulu, Hawaii.
All participants underwent a medical examination, completed a questionnaire about lifestyle and also make standard blood tests to assess the health of the cardiovascular system. Laboratory tests have also measured the total amount of fatty acids in the blood and omega-3 fatty acids which come from fish (specifically, eicosapentaenoic, docosapentaenoic and docosahexaenoic acids).
In addition, researchers have used two methods to measure the level of accumulation of cholesterol in the arteries. During the first test with the help of ultrasonic waves was measured the thickness of the walls of the carotid arteries in the neck, this test is known as the measurement of the thickness of the intima-media complex (IMT). During the second test using an electron-beam CT scanner measured calcium deposits, or "clusters" of cholesterol in the arteries of the heart, this test is known as planks for determining coronary artery calcification (CAC). Both tests were conducted to identify individuals at high risk for cardiovascular disease.
It has been found that the total level of fatty acids was similar in the three groups, but the percentage content obtained from fish omega-3 fatty acids was two-fold higher in Japanese men living in Japan (9, 2%), compared to white men ( 3, 9%) and the Japanese-American men (4, 8%), living in the United States.
The researchers also found that levels of atherosclerosis were similar among Japanese-American and white men, but markedly lower in Japanese men living in Japan. The average IMT was 37 mm less than the Japanese than white men of the same age and cardiovascular risk factors were taken into account, while the mean difference adjusted for risk among Japanese and white men with positive tests CAC is 11 percent. Both space were very significant, but became statistically insignificant when taken into account the differences in omega-3 fatty acids.
The researchers also noted that Japanese men living in Japan, the value of TIM falling, while the levels of omega-3 fatty acids increases, this feedback was not statistically significant. This relationship between the level of omega-3 fatty acids and IMT remained significant even after adjustment for traditional risk factors for cardiovascular disease. (Among Japanese men CAC values also declined, and omega-3 fatty acids increased, but the relationship was not statistically significant).
No significant inverse correlation between the level of omega-3 fatty acids and atherosclerosis
Atherosclerosis - a chronic disease of the arteries
It was observed in whites and Japanese-Americans after heart disease risk factors were taken into account.
Research has clearly demonstrated that whites and Japanese-Americans similar levels of atherosclerosis, which is significantly higher than the Japanese living in Japan. This means that a significantly lower death rate from coronary heart disease among Japanese living in Japan can hardly be explained by genetic factors.
The importance of omega-3 fatty acids derived from fish, in reducing the risk of cardiovascular disease has been a special emphasis in this cross-cultural study. Japanese men in Japan are equally bad or unfavorable risk profile for cardiovascular disease than Americans, but the level of heart disease
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below? How can it be? Japanese men Americans indeed distinguishes the fact that the blood levels of omega-3 fatty acids in two times higher in Japan than in the West.
The main conclusion from this important study is as follows: traditional risk factors lead to the formation of the traditional amount of artery clogging plaque, but only when the diet, and, possibly, a lifelong diet chronically deprived of the desired omega-3 fatty acids. Increasing your intake of omega-3 fatty acids, the level of heart disease in the West should begin to approach the figures in Japan. While this may possibly require a diet rich in omega-3 fatty acids, from birth (rather than making multiple tablets with fish oil).
Recently initiated subsequent studies, during which will be checked by the connection of omega-3 fatty acids with the progression of atherosclerosis in white men, a Japanese-American men and Japanese men living in Japan.