Scientific studies indicate that compounds in the root boost sex drive and function in both men and women through the increase in testosterone, muscle mass and energy.

 ' Tongkat Ali also inhibits Sex Hormone Binding Globulin (SHBG) which increases free testosterone in the blood.  It also slows the aging process, improving energy and sexual function. ' 

It has been used traditionally for loss of sexual desire and impotence . 

' Tongkat Ali gives a longer lasting erection, more energy and a boost in sex drive. It increases the general interest in sex and the frequency of sexual thoughts. It is found to increase testosterone levels up to 4x by stimulating it’s production in the Leydig cells of the testicles. Research has shown that tongkat ali can increase the size of the male sexual organs and increase sperm count. 

Tongkat ali is generally used more by men, but increases libido in women as well.  For women an increase in testosterone increases sexual desire and erogenous sensitivity. '