Khat (Catha edulis) up-regulates testosterone and decreases prolactin and cortisol levels in the baboon.
2006
Abstract The potential effect of Khat ( Catha edulis , Celastraceae) on fertility in humans has not been elucidated. In this study, we used the olive baboon ( Papio anubis , Cercopithecidae) to determine the effects of oral administration of khat on circulating hormones. In order to establish baseline hormonal levels, five male baboons were bled once a week for 1 month. The same baboons were then fed with crude khat juice extract once a week over a period of 2 months, and the effects on serum levels of cortisol, testosterone and prolactin determined using enzyme immunoassay (EIA) and radioimmunoassay (RIA). Subsequently, sampling was repeated for a further 1 month to determine the residual effect of khat. The results showed that khat administration causes a significant increase in the mean levels of testosterone while prolactin and cortisol levels were reduced. These effects were also evident 1 month post treatment and indicate khat may exert a transient effect on male fertility by interfering with the hormonal profiles.
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