It is an object of the present invention to provide a composition for promoting the production of type I collagen by human skin fibroblasts, and the present invention relates to a composition for promoting type I collagen production containing silybin and a peptide that promotes collagen production (peptide having an amino acid sequence of Gly-Pro-Hyp, Gly-His-Lys, Lys-Thr-Thr-Lys-Ser (SEQ ID NO: 1) or Gly-Glu-Pro-Arg (SEQ ID NO: 2).本發明之目的係提供一種組成物，其可促進人體皮膚成纖維細胞的I型膠原蛋白的產生。；為達此目的之本發明的I型膠原蛋白產生促進用組成物，係含有水飛薊賓及促進膠原蛋白產生的胜肽(由Gly-Pro-Hyp、Gly-His-Lys、Lys-Thr-Thr-Lys-Ser、或Gly-Gln-Pro-Arg的氨基酸序列所組成的胜肽)。
