最終更新日：2024/07/31
Collagen is a type of scleroprotein found in the skin, bones, and connective tissues.
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Collagen is a type of scleroprotein found in the skin, bones, and connective tissues.
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Collagen is a type of scleroprotein found in the skin, bones, and connective tissues.
Collagen is a type of scleroprotein found in the skin, bones, and connective tissues.
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