Chocolate contains vitamins, minerals and antioxidants, and these things have a positive impact on health. Chocolate also contains sugar. Excessive intake of sugar has a negative impact on health, says the University of Texas. Any kind of chocolate should be eaten in moderation.
Other drawbacks of eating too much chocolate include weight gain and interruption of sleep due to its caffeine content, says the Houston Chronicle. However, dark chocolate containing 70 percent cacao provides health benefits such as blood pressure control and reduced heart attack and stroke risk, according to Oprah.com. Real cocoa powder can be blended with skim milk for a healthy drink. People should limit their chocolate intake to 1 ounce per day.