Monga tonse tikudziwira, khungu lolimba, la duwa komanso lotanuka ndi chizindikiro cha khungu lokongola.Komabe, pamene zaka zikuwonjezeka, collagen m'thupi imataya pang'onopang'ono, ndipo idzafulumizitsanso kutaya ndi zaka, kuchititsa khungu kutaya chinyezi, sebum ndi kukalamba.Kuyambira zaka 25, collagen mu bo...
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