Coca is a plant that contains variety of nutrition.
When we hear something about “coca”, we usually connect it with drugs.
You change your mind once you visit South America, especially, the Andean region.
People in the Andean region chew coca leaves or drink “coca tea” mostly to overcome altitude sickness!
You can try “coca specialties” while being in Peru, but don’t try to bring any of them to Europe or North America, it could cause some problems with authorities…