Zina mwazomwe zimafunsira ndi mbadwo wamagetsi wolamulira, zamkati ndi makampani ogulitsa mapepala, mphamvu zam'madzi zopangira mafuta, mitundu yapadera ndi mankhwala osokoneza bongo. Ntchito zina zomwe zimapezeka kuti zikugwiritsidwa ntchito ndizothandiza, kugwirizira mpweya, zida zamadzi, zida zamadzimadzi, zida zamagetsi ndi zowasintha.