In the context of a fast changing and well documented market in legal highs, the case of khat (Catha edulis) provides an interesting anomaly. It is first of all a plant-based substance that undergoes minimal transformation or processing in the journey from farm to market. Secondly, khat has been consumed for hundreds if not thousands of years in the highlands of Eastern Africa and Southern Arabia. In European countries, khat use was first observed during the 1980s, but has only attracted wider attention in recent years.