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collagen is a type of protein, and the proportion of protein in the human body is second only to water. span data-mass = "1"> Water 70% , protein span> 20%) , and collagen occupies the human protein 30% , Widely distributed in human skin and internal organs, responsible for important functions of human health . The collagen in the human body is in 20 not 60 The content of the body when the body is only 20 The year old . In addition to quantity, quality will also decrease with age. After the quality decreases, collagen will lose elasticity, hardening or even deformation and deterioration.
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