Chocolate
is good for the heart
European
Society of Cardiology
Eating
chocolate at least once a week is linked with a reduced risk of heart disease,
according to research published today in the European Journal of
Preventive Cardiology, a journal of the European Society of Cardiology
(ESC).
“Our
study suggests that chocolate helps keep the heart’s blood vessels healthy,”
said study author Dr. Chayakrit Krittanawong of Baylor College of Medicine,
Houston, Texas.
“In
the past, clinical studies have shown that chocolate is beneficial for both
blood pressure and the lining of blood vessels,” he continued. “I wanted to see
if it affects the blood vessels supplying the heart (the coronary arteries) or
not. And if it does, is it beneficial or harmful?”
The
researchers conducted a combined analysis of studies from the past five decades
examining the association between chocolate consumption and coronary artery
disease (the blockage of the coronary arteries). The analysis included six
studies with a total of 336,289 participants who reported their chocolate
consumption.
During a median follow-up of nearly nine years, 14,043 participants developed coronary artery disease and 4,667 had a heart attack (when coronary artery disease progresses and the flow of blood to the heart is suddenly blocked).
Compared
with consuming chocolate less than once a week, eating chocolate more than once
a week was associated with an 8% decreased risk of coronary artery disease.
Dr.
Krittanawong said: “Chocolate contains heart healthy nutrients such as
flavonoids, methylxanthines, polyphenols and stearic acid which may reduce
inflammation and increase good cholesterol (high-density lipoprotein or HDL
cholesterol).”
He
noted that the study did not examine whether any particular type of chocolate
is more beneficial and whether there is an ideal portion size. “Chocolate
appears promising for prevention of coronary artery disease, but more research
is needed to pinpoint how much and what kind of chocolate could be
recommended,” he said.
While
it’s not clear how much chocolate is optimal, Dr. Krittanawong warned against
overeating. He said: “Moderate amounts of chocolate seem to protect the
coronary arteries but it’s likely that large quantities do not. The calories,
sugar, milk, and fat in commercially available products need to be considered,
particularly in diabetics and obese people.”