Izinselo zezimvu ezithosiwe, izinselo zezimvu ezinothile nge-collagen zingathuthukisa umzimba wenja, kodwa futhi zikhuthaze ukukhula nokuthuthuka kwamathambo enja, nezinja ezidla izinselo zezimvu zingasiza futhi ukugedla kwamazinyo, kubangele ukuthuthukiswa kwamazinyo nokuba mhlophe, ukunciphisa amatshe ezinyo, ngakho-ke. ..
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