Is dark chocolate healthy? |
In the past, chocolate has been considered an indulgence without benefits beyond pleasing our taste buds. Recent evidence, however, has shown that there may be significant health benefits to eating chocolate. The key to receiving these health benefits appears to be the type and amount of chocolate being consumed.
What is the origin of chocolate?
Chocolate comes from seeds (“beans”) of the fruit of the cacao tree. Cacao trees flourish only in the hot, rainy tropics of the equatorial region. Chocolate’s origins can be traced back to Mayan and Aztec civilizations in Central America who roasted cocoa beans to make a bitter drink called “chocolatl”. It was introduced into Europe by Spanish conquistadors returning from the Americas. Many years later a process for making chocolate into a solid was developed. Modern production of chocolate involves roasting and grinding cocoa beans in order to make a paste (chocolate liquor). The paste, mixed with sugar, milk, and other ingredients is heated and cooled resulting in solid chocolate. Different forms of chocolate have different percentages of cocoa. Dark chocolate is approximately 70% cocoa, whereas “white” chocolate has practically none of the cocoa solids.
What is it about chocolate that makes it healthy?
Dark chocolate and cocoa are particularly high in flavonoids, a subgroup of antioxidants known as polyphenols. Flavonoids are also present in higher concentrations in tea, red wine, and certain fruits and vegetables. Recent research has found evidence that when these flavonoids undergo fermentation by bacteria in the human gut, anti-inflammatory compounds that improve blood vessel function are produced.
What are the suggested health benefits of chocolate?
- The greatest health benefit of consuming chocolate appears to be its ability to reduce the risk of heart attack and stroke. In their Nutrition Evidence Library , the U.S. Department of Agriculture states that “moderate evidence suggests that modest consumption of dark chocolate or cocoa is associated with health benefits in the form of reduced cardiovascular disease risk.” The ways that dark chocolate could affect the risk of cardiovascular disease include:
- Antioxidants in chocolate prevent LDL cholesterol from becoming oxidized, the process that turns it into “bad” cholesterol.
- Studies from several countries have found that dark chocolate can lower blood pressure. The effect on blood pressure, however, is modest and wears off unless chocolate is eaten on a regular basis.
- Dark chocolate reduces the activation of platelets, a step in the formation of blood clots. Most strokes and heart attacks occur after clots form in blood vessels.
- Flavonoids in dark chocolate appear to reduce inflammation and plaque formation in the bloodstream that can block an artery, leading to a heart attack or stroke.
- Dark chocolate also appears to help the body use insulin more efficiently in controlling blood sugar. Insulin resistance, a condition in which the body doesn’t use insulin effectively, is associated with type 2 diabetes. By improving insulin sensitivity, eating dark chocolate could delay or prevent the onset of diabetes and pre-diabetes in certain individuals.
- Cocoa and dark chocolate may also help improve brain function. Researchers at Harvard Medical School found that older adults who drank two cups of cocoa a day had improved blood flow to parts of their brain involved with memory and thinking. Dark chocolate may also improve mood and pleasure by boosting serotonin and endorphin levels in the brain.
Are all types of chocolate equally beneficial?
Definitely not! Since its discovery, chocolate has morphed into a variety of products—powdered cocoa, dark chocolate, semi-sweet chocolate, baking chocolate, milk chocolate, white chocolate, etc. The FDA has established standards for each of these, depending on the percentage of cocoa solids that they contain. The higher the percentage of cocoa, the more flavonoids and potential health benefits will be found in the chocolate. Dark chocolate typically contains around 70% cocoa, whereas most milk chocolate has a much lower percentage of cocoa solids. White chocolate, which contains no cocoa solids, contains none of the health-promoting flavonoids. The “dark side” of all types of chocolate is that they contain a large amount of fat and are relatively calorie dense.
So, for now, even though the amount of chocolate necessary for optimal health ben efits has not been determined, it appears that eating an ounce of dark chocolate, up to 7 ounces a week, can not only please your taste buds but may offer real health benefits. Look for dark chocolate with around 70% cocoa or “chocolate solids” and keep portions at a moderate level to avoid expanding your waistline.
If you have any more questions just Ask Hanna, our health advisors are here to help.
Image: ©Shutterstock / Marina Shanti
