For students who love to eat chocolate, this may be good news. The study found that drinking a chocolate beverage, the 50-year-old to 69-year-old man scores on memory tests than they can with people decades younger rival. But the problem is that they continued to drink for three months - eating chocolate if you want to improve your memory, you have to eat a very large amount.
This small-scale study conducted recently showed that cocoa beans have called flavanol chemicals, is very conducive to the brain. Is a naturally occurring flavanols in cocoa beans, blueberries, green tea and red wine, chemicals. Previous studies have shown that consumption of flavanol-rich foods mice showed signs of enhanced memory and brain blood flow in certain areas reinforced. Columbia University neurologist Scott Small For similar therapeutic approach has little impact on the human brain.
To understand this, his team invited 19 aged 50 to 69 years of volunteer, let them drink mixed with 900 mg of powdered cocoa flavanols water or milk a day, drink twice a day. In addition 18 people are drinking a similar beverage, which contains only 10 mg of flavanols.
Prior to these people begin to experiment and three months after the experiment, the researchers were on them in the brain functional magnetic resonance imaging. By comparing angiographic results, the researchers found that those who drink large dose of flavanols, hippocampus dentate gyrus portion of the blood cells increased by 20% than before. These blood cells in the dentate gyrus of the people is higher than the low dose flavanol drink people. Interestingly, this region of the dentate gyrus and human cells with age-related memory loss.
In addition, each person participating in the experiment in the three months before and three months after have carried out memory tests. In each test, 41 subjects will see a similar abstract pictures sequentially. When this 41 graphics appear again after 82 graphics will give them and let them choose the front appeared 41 graphics. Small studies done before the team showed that from 20 years of age, adults identify've seen the reaction time of the graphics will be increased year by year, an increase of about 220 milliseconds every 10 years or so.
On average, large doses of drinking flavanol people on the reaction time of each piece of graph 630 milliseconds faster than the low-dose flavanol drink people. This is equivalent to drinking a large dose of flavanols memory performance in terms of people, younger than drinking small doses of flavanol people for 30 years.
Small but warns that it is too early now happy. He said, "Yes, chocolate contains flavanols, but a small amount. You have to eat a lot to get such benefits, and so a lot of chocolate to be injurious to your health."
"We are gradually entered the aging society, we always want to find ways to slow down along with the aging resulting from cognitive decline and other issues," professor of neurology at the Johns Hopkins School of Medicine Madhav Thambisetty said. . "The study addresses a fundamental public health issue," he said, he hopes in a more large-scale study to see what effect drinking flavanol For other types of memory - and this is Small study is intended to be the next.
Sebastian Jessberger Switzerland Suez University also agreed on the need for more research to find out what role flavanols in the end. For example, he pointed out, it is best to find flavanol impact on memory can last a long time, how many need to eat in order to play a role, and whether this compound causes a change in other parts of the body.
"If you think you just ate a drug or compound can enhance memory, or in only one area of the body is affected, it would be too naive." Jessberger said.
(Author: Aviva compilation: tadpole Jun via newscientist)
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