Cardiovascular disease is the leading cause of death worldwide. A study published in the British Medical Journal connecting the consumption of dark chocolate and heart disease is creating a lot of excitement.   The researchers concluded that the blood pressure and cholesterol lowering effects of plain dark chocolate “could represent an effective and cost effective strategy for people with metabolic syndrome (and no diabetes).”

A team of researchers from Melbourne, Australia collected 2013 participants who had high blood pressure and who met the criteria for metabolic syndrome, but had no history of heart disease or diabetes and were not on blood pressure lowering therapy.  They used a mathematical model to predict the long-term health effects and cost effectiveness of daily dark chocolate consumption in the at-risk group.

Researchers found that daily consumption of dark chocolate can reduce cardiovascular events, such as heart attacks and strokes, in people with metabolic syndrome (a cluster of factors that increases the risk of developing heart disease and diabetes).  Dark chocolate which contains at least 60% cocoa solids, is rich in the heart-protecting flavonoids.  However, this has only been examined in short term studies.

With 100% compliance (best case scenario), the researchers show that daily dark chocolate consumption could potentially avert 70 non-fatal and 15 fatal cardiovascular events per 10,000 people treated over 10 years.

Even when compliance levels were reduced to 80%, the number of non-fatal and fatal events potentially averted was 55 and 10 per 10,000 people treated over 10 years, and could still be considered an effective intervention strategy.

The model also suggested that $40 could be cost effectively spent per person per year on dark chocolate prevention strategies and could be used for advertising, educational campaigns, or subsidizing dark chocolate in this high risk population, they add.

The authors stress that only non-fatal stroke and non-fatal heart attack were assessed in their analysis, and that the potential effects on other cardiovascular events, such as heart failure, are yet to be tested.

These protective effects have only been shown for dark chocolate — at least 60-70% cocoa — rather than for milk or white chocolate, probably due to the higher levels of flavonoids found in dark chocolate.

Source: ScienceDaily (May 31, 2012)