I do know that cocoa butter is the fat that is left over from the manufacturing process of the cocoa bean and is then added back in. So it is extracted to make cocoa powder -- and then they add it back in to make whatever it is your talking about. That's why we prefer to use cocoa powder and control the amount and type of fat we use.
Generally - I think (my opinion) chocolate products are high in fat and tend to contain milk products. Some do have caffeine -- but it isn't in high amounts - at least not enough to be dangerous unless you are eating so much that the calories themselves would be dangerous.
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I am not an expert - so I'll leave that to someone else
