Isebenza njani i-collagen?
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Izinto ezintlanu ezibalulekileyo omele uzazi malunga ne-collagen
Abaninzi bethu baye bakuva malunga ne-collagen, kwaye kubaluleke kangakanani kwimpilo yesikhumba, kodwa ingaba siyayazi kangakanani malunga nayo kwaye isebenza kangakanani? I-collagen...
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