Mu mateka yose, kamere y'umugabo yakunze kugaragara ko ifitanye isano n'umusemburo we wa mbere wa testosterone. Ku myaka ye igera kuri 30, urugero rwa testosterone rutangira kugabanuka kandi ibi bishobora gutuma habaho impinduka mbi ku buzima bwe no ku mibereho ye: kugabanuka k'imikorere y'imibonano mpuzabitsina, imbaraga nke, kugabanuka k'imitsi no kwiyongera kw'ibinure, n'ibindi.
Ibi byiyongeraho ibintu byinshi bihumanya ibidukikije, imihangayiko n'imirire mibi bikunze kugaragara mu buzima bwacu bwinshi kandi ntibitangaje kubona icyorezo cya testosterone nkeya mu bagabo ku isi yose.
Mu 2013, itsinda ry'abashakashatsi bo muri Koreya ryize ku ngaruka zo guhura n'udukoko two mu mabyaitara rya laser ritukura (670nm) na infrared (808nm).
Abahanga mu bya siyansi bagabanyijemo imbeba 30 z'ingabo mu matsinda atatu: itsinda ry'abagenzuzi n'amatsinda abiri yagaragayemo urumuri rutukura cyangwa urw'imirasire ya infrared. Mu mpera z'igerageza ry'iminsi 5 aho imbeba zagaragayemo ubuvuzi bumwe bw'iminota 30 ku munsi, itsinda ry'abagenzuzi ntiryabonye ubwiyongere bwa testosterone kandi urugero rwa testosterone mu mbeba zagaragayemo umutuku n'izigaragaramo infrared rwagaragaye ko rwongerewe cyane:
“…Urugero rwa T mu maraso rwariyongereye cyane mu itsinda ry’uburebure bwa 808nm. Mu itsinda ry’uburebure bwa 670 nm, urugero rwa T mu maraso narwo rwongerewe cyane urugero rwa testosterone ku bunini bumwe bwa 360 J/cm2/umunsi.”