A low-fat food comprising an amino acid or a peptide having an effect of activatinga calcium receptor such as γ-Glu-X-Gly (wherein X represents an aminoacid or an amino acid derivative), γ-Glu-Val-Y (wherein Y representsan amino acid or an amino acid derivative), γ-Glu-Ala, γ-Glu-Gly,γ-Glu-Cys, γ-Glu-Met, γ-Glu-Thr, γ-Glu-Val, γ-Glu-Orn,Asp-Gly, Cys-Gly, Cys-Met, Glu-Cys, Gly-Cys, Leu-Asp, D-Cys, γ-Glu-Met(O),γ-Glu-γ-Glu-Val, γ-Glu-Val-NH