I roto i te hītori, kua honoa te mauri o te tāne ki tana homoni tāne matua, arā, te testosterone. I te 30 tau pea te pakeke, ka tīmata te heke o ngā taumata testosterone, ā, ka hua ake pea he maha ngā huringa kino ki tōna hauora tinana me tōna oranga: te hekenga o te mahi moepuku, te iti o te kaha, te hekenga o te papatipu uaua me te pikinga o te ngako, me ētahi atu.
Tāpiri atu ki tēnei ko ngā poke mutunga kore o te taiao, te ahotea me te kai koretake e tino kitea ana i te nuinga o ō tātou oranga, ā, ehara i te mea miharo kei te kite tātou i te mate urutā o te testosterone iti i roto i ngā tāne puta noa i te ao.
I te tau 2013, i rangahauhia e tētahi rōpū kairangahau Kōrea te pānga o te pānga o te whakaraeraetanga o te kōpū kite mārama taiaho whero (670nm) me te rama pūwhero (808nm).
I wehea e ngā kaipūtaiao ngā kiore tāne e 30 kia toru ngā rōpū: he rōpū whakahaere me ngā rōpū e rua i whakaraeraetia ki te mārama whero, ki te mārama whero-whero rānei. I te mutunga o te whakamātautau 5-rā i te wā i whakaraeraetia ai ngā kiore ki te kotahi maimoatanga 30-meneti i te rā, kāore te rōpū whakahaere i kite i te pikinga o te testosterone, ā, i kitea he tino pikinga ngā taumata testosterone i roto i ngā kiore whero me ngā kiore i whakaraeraetia:
"...I tino piki ake te taumata T toto i roto i te rōpū roangaru 808nm. I roto i te rōpū roangaru 670 nm, i tino piki ake hoki te taumata T toto i ngā taumata testosterone i te kaha kotahi o te 360 J/cm2/rā."