The HO commissioned two studies in 2009 to explore the social harms associated with khat use. The first of these is a qualitative study exploring perceptions of the social harms associated with khat use; the availability of treatment services provided for khat users; and perceptions of the appropriate role of Government intervention. The second is a review of the national and international literature examining the evidence on the social harms associated with khat and the impact of legislation in countries which have legislated against khat use and supply.
The perceived health effects of khat are briefly reported on in each of the studies. The Home Office has not commissioned any overall evaluations of the health effects associated with khat use.