Five male baboons were given a 250 gram oral dose of khat juice weekly for eight weeks. The amount of the dose was based on personal accounts and interviews of male Kenyans who chew khat regularly, and was then adjusted for the weight of the animals, Mwenda said.
During the eight weeks when khat was administered, scientists also collected blood samples of the baboons on a weekly basis. The blood was later used for analysis of hormonal levels. The body weight of the baboons dropped as much as 10 percent in the two month testing period, and blood pressure increased by about 36 percent. The baboons were under anesthesia during this procedure, so no changes in behavior were observed. However, researchers said that the baboons had penile erections during the experiment, a result of higher testosterone levels from the khat.
Testosterone levels increased with the administration of khat and remained higher than normal for a month after the conclusion of the experiment before gradually returning to normal. Khat had a reverse effect on prolactin and cortisol levels, which decreased during the study and remained low for several weeks before returning to normal. Body weight returned to normal after about three months.
in this research we learn two things, that Khat helps you lose weight, and that Khat gives you erections, the two things that Somalis in the West needs.
I always knew it made men horny/viagra erection but i didnt know khat contained testestorones??? 
