2. Ko te tiaki kiri, he pai te collagen mo te kiri kia kaha ki te tiaki kiri, ataahua, na te mea ko te collagen te mahi o te whangai kiri, ka taea te pupuri i te elasticity o te kiri, te pupuri i tana moisturizing me te marama elasticity, te whakatika i te kiri pakaru. , whai hua whakau i te kiri, korukoru, mau tonu moisturizing;