There is not enough data as to what form of chocolate is good, and how much chocolate is good, Khawaja said. Studies tend to ask participants about whether they consume chocolate or dark chocolate, but not what kind. To make matters worse, people often forget or misrepresent how much they really eat.
http://www.cnn.com/2016/02/10/health/chocolate-health-benefits/index.html
As with berries and leafy greens, the darker the color of the chocolate, the more antioxidants it contains and the better it is for you. Also, milk binds to the antioxidants eliminating their ability to fight free radicals, so eating milk chocolate or drinking milk with dark chocolate has few to no health benefits.
http://www.chopra.com/articles/the-health-benefits-and-risks-of-dark-chocolate
I only recommend eating small amounts of minimally processed dark chocolate with at least a 70 percent cocoa content or higher. This type of chocolate is a healthy chocolate that contains the most powerful antioxidants and the least amount of sugar, providing the most benefits of dark chocolate you can get.
https://draxe.com/benefits-of-dark-chocolate/
It’s High in Minerals. Dark chocolate is a mineral powerhouse. One ounce of dark chocolate—recommended daily serving—contains the following daily recommended doses of minerals: copper (25 percent), calcium (2 percent), iron (19 percent), magnesium (16 percent), potassium (6 percent), and zinc (6 percent).
http://www.chopra.com/articles/the-health-benefits-and-risks-of-dark-chocolate
This type of chocolate contains the most powerful antioxidants and the least amount of sugar. Thankfully, there are a lot of chocolate brands today that offer options that fits this 70 percentage minimum suggestion. The higher the percentage, the greater the potential health benefits of dark chocolate.
https://draxe.com/benefits-of-dark-chocolate/
For now, it is probably safe to say that dark chocolate is good -- or at least, not bad. But until we have more data, don't eat too much. If you're having a serving once or twice a day, fine. But don't start having it six times a day, Khawaja said.
http://www.cnn.com/2016/02/10/health/chocolate-health-benefits/index.html
(Chocolate) is a good antioxidant, it has a good effect on inflammation. We think most of the beneficial effects are because of this, said Dr. Owais Khawaja, a cardiology fellow at St. Vincent Mercy Medical Center in Toledo, Ohio. These benefits might include reducing the risk of cancer and dementia, Khawaja said.
http://www.cnn.com/2016/02/10/health/chocolate-health-benefits/index.html
Healthy Eating. Dark chocolate has recently been discovered to have a number of healthy benefits. While eating dark chocolate can lead to the health benefits described below, remember that chocolate is also high in fat. Use FitDay to keep track of your calories and nutrition as you work towards your weight loss goals. 1) Dark Chocolate is Good for Your Heart.
http://www.fitday.com/fitness-articles/nutrition/healthy-eating/6-health-benefits-of-dark-chocolate.html
Dark chocolate contains polyphenols, a powerful type of antioxidant that is also found in foods like berries, green and black tea, and red wine. These polyphenols help to defend the body’s cells against free radicals from environmental toxins and diseases, including heart disease, cancer, and chronic inflammation.
http://www.chopra.com/articles/the-health-benefits-and-risks-of-dark-chocolate
Dark chocolate is made from cacao or cocoa. All chocolate starts as harvested cacao beans from the plant’s seed pods. Once harvested, the cacao beans are typically fermented and dried before being sent off to factories for further production. Pure cacao and pure cocoa powder both have antioxidants and health benefits.
https://draxe.com/benefits-of-dark-chocolate/
what are the benefits of eating special dark chocolate
 The benefits of  special dark chocolate are eating to defend the body’s cells against free radicals from environmental toxins and diseases, including heart disease, cancer, and chronic inflammation. The benefits of eating special dark chocolate is it defend the body’s cells against free radicals from environmental toxins and diseases, including heart disease, cancer, and chronic inflammation.