Njengoba sonke sazi, isikhumba esiqinile, esiqhakazile, nesinwebekayo siwuphawu lwesikhumba esihle.Kodwa-ke, njengoba iminyaka ikhula, i-collagen emzimbeni izolahlekelwa kancane kancane, futhi izosheshisa ukulahlekelwa neminyaka, okwenza isikhumba silahlekelwe umswakama, i-sebum nokuguga.Kusukela eminyakeni engu-25, i-collagen ku-bo yethu ...
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