Another important thing about Cacao, is that it enhances the bioavailability nutrients of other foods, such as herbs specially. A blend of CACAO in its natural state with herbs is very nourishing/healing.
I always go for raw cacao powder, and raw chocolate bars at the health stores. The only ingredients I look for are wildcrafted cacao, or cacao, coconut sugar crystals or honey, (agave syrup last option), vanilla bean, and salt. It is delicious! I eat a whole bar on my training days.