Performance enhancing drugs

Hormonal enhancement means using hormones to enhance the power of living beings. During the 20th. and the 21st. century, many sportsmen used such enhancements illegaly to win sport events.

Testosterone
Testosterone can be used to enhance the power of muscles. It can also be used to enhance the intelligence during the embryonal stage. The negative sideeffects of this enhancement are that people enhanced this way lack social skills and language skills. In Dragon Ball Z vs Star Trek The Beginning of Infinity, it's stated that the intelligence of the advisors of the king of the Tsufurujin and of the members of some other high castes of the Tsufurujin became enhanced via testosterone. One reason why they enhance the intelligence via this way is to prevent that all members of the higher castes work together to rebel against the king. The Tsufurujin also use testosterone to enhance the muscle power of soldiers and workers.