The present invention addresses the problem of providing technology for heightening a small intestinal absorption property of a peptide having physiological functionality. This problem is solved via a composition containing a peptide composed of amino acid sequence (a), and one or two or more selected from the group consisting of peptides composed of amino acid sequence (b) or (c). Preferably, said one or two or more peptides selected from the group consisting of peptides composed of amino acid sequence (b) or (c) include one or two or more selected from the group consisting of peptides composed of amino acid sequences (d)-(f). (a) Val-Pro (b) Xaa-Xaa-Val-Pro (c) Val-Pro-Xaa (d) Leu-Pro-Val-Pro (e) Val-Pro-Asn (f) Val-Pro-Gln

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