Coffee vascular guard or heart killer?
As one of the more and more popular drinks, the role of coffee has been controversial. The focus of the debate is whether this caffeinated drink is good for the cardiovascular system in humans, a heated debate that has existed since the physical and chemical properties of coffee were analyzed.
Recently, scientists from South Korea released a study that found that drinking coffee can reduce the risk of clogging blood vessels. In a survey of 25000 subjects, the researchers found that those who drank five cups of coffee a day had a lower risk of cardiovascular disease.
For a long time, medical workers have tried to make a final conclusion on this problem by using methods such as angiography, but they have come to a completely different conclusion. Some experiments have shown that coffee can lead to higher blood cholesterol levels and higher blood pressure, which in turn increases the risk of heart disease, while other researchers say coffee protects the heart.
This time, South Korean scientists used different research indicators. Previous studies have found that there are different degrees of calcium deposition in human blood vessels, which is closely related to the incidence of heart disease. In the survey, the researchers found that this deposit was also found in the blood vessels of many respondents who had no history of heart disease. As a result, the researchers focused on the relationship between this calcium deposition and coffee consumption, and finally came to this conclusion.
However, the researchers also say they need to further verify this conclusion.
Caffeine in coffee is thought to stimulate the brain, but caffeine has also sparked a debate among many people about the health of coffee.
Health experts in different countries also have different views on this issue.
Nutrition experts in the United States have recommended that each person should consume no more than 400 milligrams of caffeine per day, while the UK believes that it is not necessary to limit the amount of caffeine that people can eat except for pregnant women. The caffeine intake of pregnant women should be limited to less than 200 mg, that is, no more than two cups of instant coffee a day.
■ is from "Biological Valley."
Source: China Food Daily
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