PROBLEM TO BE SOLVED: To clarify detailed characteristics of a N1 peptide and a N1-like peptide； and to provide a polypeptide having a feeding regulation effect, a production method of the polypeptide, a feeding regulation composition containing the polypeptide etc. as an active ingredient, and a method for regulating the food intake using the above.SOLUTION: There are provided: a polypeptide that has the feeding regulation action, and consists of a specific amino acid sequence； a polypeptide that consists of an amino acid sequence in which 1 or several amino acids are deleted, substituted, inserted, and/added； or a polypeptide that consists of an amino acid sequence that has an identity of 60% or more for the above amino acid sequence.
