The purpose of the present invention is to provide a novel composition for promoting ketone body formation. The present invention provides a composition for promoting ketone body formation, the composition containing one or more amino acids selected from the group consisting of citrulline, leucine, cysteine, taurine, glutamine, and aspartic acid. This composition may also contain medium-chain fatty acids and/or medium-chain fatty acid esters.本發明係以提供一種用來促進酮體生成的新穎組成物為目的。根據本發明，可提供一種酮體生成促進用組成物，其係包含選自瓜胺酸、白胺酸、半胱胺酸、牛磺酸、麩胺酸及天冬胺酸所成群組的1種或2種以上之胺基酸而成。本發明之組成物亦可進一步包含中鏈脂肪酸及中鏈脂肪酸酯之任一者或兩者。
