Source:
Federation of American Societies for Experimental
Biology
Summary:
It might seem too good to be true, but dark
chocolate is good for you and scientists now know why. Dark chocolate helps
restore flexibility to arteries while also preventing white blood cells from
sticking to the walls of blood vessels. Both arterial stiffness and white blood
cell adhesion are known factors that play a significant role in
atherosclerosis. What's more, the scientists also found that increasing the
flavanol content of dark chocolate did not change this effect.
It might seem too good to be true, but dark
chocolate is good for you and scientists now know why. Dark chocolate helps
restore flexibility to arteries while also preventing white blood cells from
sticking to the walls of blood vessels. Both arterial stiffness and white blood
cell adhesion are known factors that play a significant role in
atherosclerosis. What's more, the scientists also found that increasing the
flavanol content of dark chocolate did not change this effect. This discovery
was published in the March 2014 issue of The FASEB Journal.
"We provide a more complete picture of the
impact of chocolate consumption in vascular health and show that increasing
flavanol content has no added beneficial effect on vascular health," said
Diederik Esser, Ph.D., a researcher involved in the work from the Top Institute
Food and Nutrition and Wageningen University, Division of Human Nutrition in
Wageningen, The Netherlands. "However, this increased flavanol content
clearly affected taste and thereby the motivation to eat these chocolates. So
the dark side of chocolate is a healthy one."
To make this discovery, Esser and colleagues
analyzed 44 middle-aged overweight men over two periods of four weeks as they
consumed 70 grams of chocolate per day. Study participants received either
specially produced dark chocolate with high flavanol content or chocolate that
was regularly produced. Both chocolates had a similar cocoa mass content.
Before and after both intervention periods, researchers performed a variety of
measurements that are important indicators of vascular health. During the
study, participants were advised to refrain from certain energy dense food
products to prevent weight gain. Scientists also evaluated the sensory
properties of the high flavanol chocolate and the regular chocolate and
collected the motivation scores of the participants to eat these chocolates
during the intervention.
"The effect that dark chocolate has on our
bodies is encouraging not only because it allows us to indulge with less guilt,
but also because it could lead the way to therapies that do the same thing as
dark chocolate but with better and more consistent results," said Gerald
Weissmann, M.D., Editor-in-Chief of The FASEB Journal. "Until the 'dark
chocolate drug' is developed, however, we'll just have to make do with what
nature has given us!"