(57)< Abstract > Carbon count 7 the fatty acid which is, desirably n-heputan acid, the heredity characteristic metabolism disease or acquired characteristic metabolism obstacle, being the energy source which for the patient who possesses especially long chain fatty acid metabolism incompletion is superior became clear. In addition, carbon count 7 as for the fatty acid which is, can add to the nutrition auxiliary substance for the patient who needs the increase of the energy production which is derived from fatty acid metabolism.炭素数が7である脂肪酸、好ましくはn-ヘプタン酸が、遺伝性代謝疾患または後天性代謝障害、特に長鎖脂肪酸代謝不全を有する患者のための優れたエネルギー源であることが明らかになった。また、炭素数が7である脂肪酸は、脂肪酸代謝に由来するエネルギー生産の増加を必要とする患者のための栄養補助剤に加えることができる。