Have a look at the International Cocoa Organisation web site (icco.org) for some statistics on the nutritional value of chocolate and cocoa. Basically, cocoa, in itself, is nutritional and, as incitatus points out, is high in certain trace elements as well as having an anti-oxidant effect. Also, it has been proven that chocolate can help make you feel happier by raising endorphin levels and that can only be a good thing! It is all the fat and sugar that is included in chocolate bars that makes them unhealthy/bad for your teeth etc. UK chocolate contains far less cocoa solids than choccie in most other european countries and because of this, UK chocolate was very nearly not allowed to be called "chocolate" anymore - see the Cocoa and Chocolate Products (England) Regulations 2003. Good to see Brussels have their priorities sorted.