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BMJ: A large amount of intake of refined grains or directly related to the incidence of heart disease and risk of death

Recently, a research report published in the International Magazine British Medical Journal. Scientists from the St. John Research Institute and other institutions from India have found that compared with all grains (unsteady), a large number of intake of refined grains or with and with Direct correlation with individual heart disease and death risk. Grain such as oats, barley, rice, and wheat accounts for about 50%of the daily calorie intake of the global population, and in low -income countries, especially in Africa and South Asia, this ratio is even as high as 70%.

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Full grains often contain more dietary fiber, vitamins, minerals and essential fatty acids than refined grains; previous research results show that higher whole grain intake is directly related to individual cardiovascular disease and risk of death, but research Personnel did not find the relationship between these diseases and refined grain intake. In order to solve this problem, researchers began to study the relationship between intake of refined grains, whole grains and refined white rice and crowd cardiovascular disease (CVD) and mortality.

In the article, the researchers analyzed the data of 137 and 130 participants from the aged 35-70 years between 21 and low-income countries. These participants had no history of heart disease and joined the forward-looking urban and rural areas. Pure Study (Pure Study, Prospective Urban and RURAL EPIDEMIOLOGAL Study). Subsequently, the researchers tested white rice from other refined grains, because more than 60%of the Pure research queue lived in Asian regions with rice as a staple food.

At the beginning of the research, the researchers collected detailed information such as the education, wealth, lifestyle, and medical history of the participants. During the 9.4 -year follow -up process, participants followed the mortality rate of cardiovascular disease or severe cardiovascular disease, including heart disease, stroke and heart failure. After considering other potential factors, the researchers found that compared with the lowest category intake (less than 50 grams/day), the highest category intake of refined grains (at least 350 grams per day or about 7 copies per day per day ) It is related to the increase of the risk of death by participants and the risk of severe cardiovascular disease by 33%.

At the same time, a large number of intake of blood pressure in the seas of refined grain, but the researchers did not find a significant relationship between the intake of refined grains or white rice and the ending of the health. This is a observation research. At present, researchers cannot determine the cause and effect between the two. At the same time, the researchers also point out some limitations. sex. However, researchers use data from 21 countries in the five continents to analyze a wide range of diet model, which means that related research results may be reliable and can be widely used in the population of the world.

Therefore, researchers suggested that people should be encouraged to reduce the intake of refined foods globally, and at the same time advocate intake of whole grains; researchers summarize, reduce the intake of carbohydrates and improve the quality of carbohydrates It is essential for maintaining physical health. (

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Primitive source:

Sumathi Swaminathan, Mahshid Dehghan,John Michael Raj, et al. Associations of cereal grains intake with cardiovascular disease and mortality across 21 countries in Prospective Urban and Rural Epidemiological study: prospective cohort study, BMJ (2021). DOI:10.1136/bmj.m4948

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