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...collagen is the main structure of skin. However, the collagen and elastin will reduce and lack because of sun oxidation and air pollution as the time flies, . As sustainment of skin, flexibility fibre and co...
...collagen is the main structure of skin. However, the collagen and elastin will reduce and lack because of sun oxidation and air pollution as the time flies ,Assustainment of skin, flexibility fibre and colla...