B1 中級 英國腔 1173 分類 收藏
Imagine you could ask a bunch of Nobel Prize winners one question: Whatís the secret to
your intelligence? They answer: Chocolate. It sounds crazy but itís not as far from
the truth as you might think. Last year a study found a significant correlation between
chocolate consumption per capita and the number of Nobel laureates from various countries.
The linear correlation was surprisingly strong. All countries fall nicely around a trend lineÖ
except for Alfred Nobelís homeland Sweden, which has far more nobel prize winners per
capita given their chocolate consumption. We'd all love to believe that chocolate can
boost our intelligence... Well, can it? Thereís something super inside chocolateódark chocolate,
not milk chocolateóand thatís flavanol, a potent antioxidant. So far flavanols have
been shown to lower blood pressure a little by improving the function of the inner lining
of blood vessels, so itís easier for blood to flow through them. Flavanols have also
been effective in slowing down or even reversing the reduction in memory and thinking skills
that occur with aging. In one study, elderly participants were given two cups of flavanol
rich or flavanol poor cocoa to drink every day. Well, neither the flavanol rich or poor
cocoa led to any overall effects on patientís cognitive abilities... Except for those who
already had compromised blood flow and white matter damage to their brains. These people
found that blood flow in their brains improved by 8% and the time it took to complete a working
memory test went down from 167 to 116 seconds. Since chocolate only boosted blood flow to
the brain and memory skills in those with impairments, the benefits arenít quite applicable
to a larger, healthy population. But, watch this spaceóthere are still lots of studies
being done looking into possible benefits of chocolate consumptionÖ some funded by
big confectionary companies. And thereís still this correlation between chocolate consumption
of a country and their number of nobel laureates. Of course correlation does not imply causationóit
indicates that either a countryís chocolate consumption influences the number of nobel
prizes won, the number of nobel prizes won influences a countryís chocolate consumption,
or both chocolate and prizes are influenced by a common factor. If you are craving flavanols,
chocolate isn't the only, or best, way to get themóthe amount of flavanols in dark
chocolate varies a lot depending on the type of cocoa bean, where itís from and how itís
manufactured. Sometimes flavanols are even removed from chocolate because of their bitter
taste. Tea, grapes and apples are other rich sources of flavanols. Chocolate is, like other
things, a sometimes food. If youíre new to BrainCraft, be sure to subscribe for a new
video every other week.


多吃巧克力會變聰明嗎? (Can Chocolate Make You Smarter?)

1173 分類 收藏
林曉玉 發佈於 2015 年 4 月 24 日
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