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It is not known why or how chocolate brings about the benefit, but past studies found that consuming chocolate, particularly dark chocolate, which is rich in flavonols found in cocoa, is correlated to better heart health, so perhaps the same reasoning applies here again.
The study was conducted on 55,502 people in Denmark, consisting of both men and women, between the ages of 50 and 64 years old. They entered the study between 1993 to 1997. It was found that
people who ate one serving of chocolate per week, which is about 28.35 grams (1 ounce), were 17 percent less likely to have Atrial Fibrillation, compared to those who ate chocolate less than once a month. Those who ate a little more chocolate than that - 2 to 6 servings per week, were 20 percent less likely to have the condition. In women, the greatest risk reduction came with consuming 1 serving per week, while in men, it came with consuming 2 to 6 servings per week.
This is certainly lovely news for chocolate lovers, but before you run out to buy yourself the largest slab of chocolate, experts are once again eager to caution us against making chocolate out to be anything but the devilish sugary fattening monster it is.
In all seriousness, researchers list the limitations of the study:
- Factors like the presence of health conditions such as kidney disease and sleep apnea that influence the risk of atrial fibrillation were not taken into account
- Participants who ate the most chocolate had a lower body mass index compared to those who ate the least. This prompted other feedback that a healthier diet and exercise was the greater factor in reducing the risk of atrial fibrillation
- 13.5 years is a long time and diets and habits could have changed over this time (information about participant's diet was only collected at the beginning of the study)
- The type of chocolate and amount of flavanols in the participants' diets is unknown.
- The type of chocolate and amount of flavanols in the participants' diets is unknown.
Sources: http://heart.bmj.com/content/early/2017/05/01/heartjnl-2016-310357
http://www.npr.org/sections/thesalt/2017/05/24/529843647/eating-chocolate-a-little-each-week-may-lower-the-risk-of-a-heart-flutter
http://www.channelnewsasia.com/news/health/chocolate-tied-to-decreased-risk-of-irregular-heart-rhythm-8877486
http://www.channelnewsasia.com/news/health/chocolate-tied-to-decreased-risk-of-irregular-heart-rhythm-8877486
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