Abesilisa badinga ukuphuza itiye eliluhlaza kaningi. Ososayensi bathole into engu-L-theanine esiphuzweni, esebenza ebuchosheni besilisa futhi inyuse ikhono labo lokucabanga nokwenza izinqumo. Lokhu kutholwa kwandulelwe yisilingo lapho amavolontiya angama-44 abambe khona iqhaza.
Ekuqaleni, abaphendulile bacelwa ukuthi baphuze itiye eliluhlaza. Futhi ngemuva kwalokho, cishe ihora kamuva, sabahlola. Ngenxa yalokho, isithombe sivele kanje: lawo mavolontiya aphuza itiye ngaphambi kokuhlolwa enza kangcono ngokuhlolwa. Ubuchopho babo busebenza ngokuzikhandla kunalabo abangaphuzanga itiye.
Lesi siphuzo, odokotela bathi, siqukethe ama-polyphenols amaningi. Ukusetshenziswa kwabo kuyasiza ukukhuluphala, isifo sikashukela, i-atherosclerosis, izifo zamathumbu. Kepha ngasiphi isizathu lezi zinto zithinta kakhulu amadoda, okwamanje akucaci kososayensi.