How Much Chocolate is Needed for Heart Disease Prevention?

Chocolate (in Moderation) Is Good for Your Heart

More studies can be done to refine results, but it seems that many types of chocolate, dark as well as milk, confer benefits to one's heart health.
More studies can be done to refine results, but it seems that many types of chocolate, dark as well as milk, confer benefits to one's heart health. | Source

A Meta-Analysis of Seven Independent Studies

Many studies have been done that have reported the positive health and psychological effects of chocolate consumption. Some of these studies have focused on the ability of chocolate to reduce heart disease and stroke. In August of 2011, a meta-analysis was published covering seven of these studies, including over 110,000 people from Europe and North America. Conclusions from this report allow us to make some general conclusions about the positive health effects of chocolate consumption (1).

Diseases covered by the seven studies included coronary heart disease, high blood pressure, myocardial infarction, diabetes, stroke, cardiovascular disease and heart failure. Chocolate consumption reduced the risk of all of these diseases, except heart failure, by about 30%.

Six of the studies included on European and North American Caucasians. So, it is interesting to speculate, would the conclusions reached by the meta-analysis be pertinent for other populations that have different genetic and cultural backgrounds?

So, How Much Chocolate for Increasing Heart Health?

It can be a bit confusing to interpret research studies that use different methods, but the general conclusion of the "meta analysis" study was that the highest rates of cocoa intake resulted in disease reduction. The analysis included only the lowest and highest levels reported by each of the seven studies covered. The highest levels resulted in disease reduction. It is instructive to look at the various criteria used for the highest levels used in these studies:

Study 1: once a week or more

Study 2: once a week or more

Study 3: more than once a week

Study 4: 4.2 grams of cacao per day (4)

Study 5: more than one per day

Study 6: 7.5 grams of chocolate per day

Study 7: more than 5 per week

(See below for a discussion of how much chocolate is needed per day......)

Consumption of 4.2 grams per day of cocoa was found to significantly reduce systolic blood pressure and the risk of cardiovascular mortality.
Consumption of 4.2 grams per day of cocoa was found to significantly reduce systolic blood pressure and the risk of cardiovascular mortality. | Source

Chocolate Antioxidants Help with Cardiovascular Disease

Chocolate contains common plant chemicals known as flavonoids. Also known as polyphenols, some of these, like quercetin, are known to have antioxidant properties that can benefit and combat diseases related to aging. The link to quercetin explains why antioxidants can have an effect to help prevent atherosclerosis, or hardening of the arteries.

Most medical advice regarding chocolates and getting the benefits from them, indicate that dark chocolates are more likely to have the higher content of flavonoids. This contradicts with some of the study results above, but I think it a fair bet for you to consume a little dark chocolate each week, in place of milk chocolates and other sweets that are over-processed. Processing decreases the amount of flavonoids in chocolate, as well as in other foods.

Heal Your Heart with Wine and Chocolate: ...and 99 Other Ways Women Can Protect Their Hearts
Heal Your Heart with Wine and Chocolate: ...and 99 Other Ways Women Can Protect Their Hearts

Heart disease is the number 1 health threat for women. Find many different ways to reduce the risk of heart disease, including intake of chocolate and wine.

 

How Much Chocolate Is Enough?

With all of these various criteria, one can at least conclude that once a week or more is needed to confer the health benefits. Study six is the most exact criteria for consumption, so I would assume that 7.5 grams of chocolate per day is a good recommendation. You could consume 7 x 7.5 = 52.5 grams once a week or spread it out. This weekly amount is equivalent to eating four and a half pieces of Toblerone Milk Chocolate with Honey and Almond Nougat. You also get an extra 43 calories for each piece you eat, about half of which are from fat. (2)

The forms of chocolate included in the studies included chocolate drinks, bars and snacks. The various types of snacks included desserts, supplements, confections and candy bars. There was no distinction between types of chocolate, white or dark, in the seven studies.

However, polyphenols are more prevalent in the dark chocolates, less so in milk chocolates and nonexistent in white chocolates. (3) So there should be an adjustment in studies for the relative polyphenol content when reporting the effects of chocolate on health.

References

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Comments 5 comments

Derdriu 4 years ago

Randy, What an interesting, practical, useful summary of the good which chocolate does to the heart! It validates the giving of chocolates on Valentine's Day to those one loves.

Thank you for caring and sharing, etc.,

Derdriu


Randy M. profile image

Randy M. 4 years ago from Liberia, Costa Rica Author

Love and chocolates are part of the same thing to me.


Healthexplorer 3 years ago

We read in many articles that chocolate is good for health but many of us do not know the right amount which is important. Though there is no particular amount suggested in any study but consuming in moderate amount is the best. dark chocolate is best as it contains more flavonoids.


Randy M. profile image

Randy M. 3 years ago from Liberia, Costa Rica Author

I don't think you read my article, Healthexplorer. There are indications as to the amount of chocolate that is needed to elicit health benefits. Read it again, or better yet, check my resources if you are in doubt.


Keisha Hunter profile image

Keisha Hunter 2 years ago from Paradise and then some

Awesome stuff! I'm definitely going to be looking at this closer.

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