Compositions containing peptide analogs of PYY, the analogues, as well as metabolic disorders, for example, impaired energy metabolism, for example, for the prevention, calories and appetite reduction target, or reduction in food intake and treatment of obesity and diabetes How to Use the analogues for the reduction of the intake.PYYのペプチド類似体、前記類似体を含む組成物、並びに、代謝障害、例えば、エネルギー代謝障害、例えば、糖尿病及び肥満の治療及び予防のため、及び対象の食欲減少、食物摂取量の減少又はカロリー摂取量の減少のための前記類似体の使用方法。