PROBLEM TO BE SOLVED: To provide dietary therapies for treatment of: epilepsy, particularly the epilepsy in patients who currently require a ketogenic diet; diseases associated with inherited mitochondrial dysfunction; and disorders associated with mitochondrial dysfunctions, including acquired ones including diabetes, Parkinson's disease and dementias.SOLUTION: A composition suitable for human consumption comprises a decanoic acid and octanoic acid in a ratio of at least 2:1 wt/wt, or is substantially free from octanoic acid, and optionally is substantially free from any other saturated fatty acid.SELECTED DRAWING: None【課題】てんかん、特に現在ケトン食を必要としている患者における前記てんかん;先天性のミトコンドリア機能不全に関連する疾患;並びに、糖尿病、パーキンソン病及び認知症を含む後天性を含む前記ミトコンドリア機能不全に関連する障害を治療するための食事療法の提供。【解決手段】ヒトによる消費に適した組成物であって、デカン酸及びオクタン酸を少なくとも2:1wt/wtの比で含み、又は実質的に前記オクタン酸を含まず、並びに任意選択で他の飽和脂肪酸を実質的に含まない組成物。【選択図】なし