Munhoroondo yese, hunhu hwemurume hwave huchibatanidzwa nehomoni yake huru yemurume inonzi testosterone. Paanosvika makore makumi matatu, huwandu hwe testosterone hunotanga kudzikira uye izvi zvinogona kukonzera shanduko dzakawanda dzisina kunaka pahutano hwake: kudzikira kwebasa repabonde, kushaya simba, kudzikira kwetsandanyama uye kuwedzera mafuta, nezvimwewo.
Wedzera izvi nekusvibiswa kusingaperi kwezvakatipoteredza, kushushikana uye kudya kusina kunaka izvo zvakajairika muhupenyu hwedu hwakawanda uye hazvishamisi kuti tiri kuona denda re testosterone shoma muvarume pasi rese.
Muna 2013, boka revaongorori vekuKorea rakaongorora kukanganiswa kwekusangana nematesticular nechiedza chelaser chitsvuku (670nm) uye infrared (808nm).
Masayendisiti akapatsanura makonzo echirume makumi matatu mumapoka matatu: boka rekudzora uye mapoka maviri akasangana nechiedza chitsvuku kana che infrared. Pakupera kwekuyedzwa kwemazuva mashanu uko makonzo akasangana nekurapwa kamwe chete kwemaminitsi makumi matatu pazuva, boka rekudzora harina kuona kuwedzera kwe testosterone uye mazinga e testosterone mumakonzo ese ari maviri akaonekwa aine infrared nered akaonekwa aine kukwira kwakanyanya:
"...Nhamba yeT muropa yakawedzera zvakanyanya muboka re808nm wavelength. Muboka re670 nm wavelength, nhanho yeT muropa yakawedzerawo zvakanyanya mazinga etestosterone nesimba rakafanana re360 J/cm2/zuva."