PROBLEM TO BE SOLVED: To provide methods of treatment having many therapeutic effects on diseases including cancers, multiple sclerosis, and neurological disorders.SOLUTION: According to the analysis of a goat serum, it is identified that the goat serum includes, as active ingredients: a proopiomelanocortin (POMC) peptide； a corticotropin releasing factor (CRF) peptide； and breakdown products of these peptides. These peptides and their products, and methods of producing the peptides are provided.【課題】ガン、多発性硬化症および神経障害を含む病気に多くの治療効果を有する治療法の提供。【解決手段】ヤギ血清の分析により有効成分はプロオピオメラノコルチン（POMC）およびコルチコトロピン放出因子（CRF）ペプチド、ならびに、これらの分解ペプチド生成物を含むと同定された。これらのペプチドおよび調製物。さらにペプチドの製造方法。【選択図】図１７
