Fuente: WIPO "milk" Provided is a technique that allows for the promotion of energy expenditure. The present invention is a composition for promoting energy expenditure, including, as an active ingredient, a milk protein hydrolysate having an average molecular weight of 220 Daltons or more and 1,000 Daltons or less, a peptide having only Met-Lys-Pro, or a peptide including the amino acid sequence.