From the ever-informative ProHealth.com is this informative article about the potential benefits of dark chocolate on chronic fatigue patients...let's have a look at all the benefits! Here's an excerpt from this great article:
"...One study found that a substance in cocoa helps the body process nitric oxide (NO), a compound critical for healthy blood flow and blood pressure. Another study showed that flavonols in cocoa prevent fat-like substances in the bloodstream from oxidizing and clogging the arteries, and make blood platelets less likely to stick together and cause clots. Flavonoids are plant compounds with potent antioxidant properties; so far, scientists have found more than 4,000 kinds. Cocoa beans contain large quantities of flavonoids, and so do red wine, tea, cranberries, peanuts, strawberries, apples and many other fruits and vegetables.(2) The flavonoids in chocolate are called flavonols.

Generally, science has found that dark chocolate is higher in flavonoids than milk chocolate.(3) The way that cocoa powder and chocolate syrups are manufactured removes most flavonoids. "
Find the rest of this very intriguing, in-depth article here on ProHealth.com.