An object of the invention is to provide compositions containing lignan-class compounds as dissolved at high concentrations. The compositions having lignan-class compounds such as sesamin and episesamin dissolved in solvent oils or fats that contain triglycerides of middle-chain fatty acids having 8-12 carbon atoms, preferably triglycerides of caprylic acid and/or capric acid and/or lauric acid can contain the lignan-class compounds stably at higher concentrations than when other solvents are used and, hence, have high enough value as foods and pharmaceuticals.本發明係提供一種含有使木聚糖類化合物溶於高濃度之組成物為目的者。其特徵係以含有碳數8~12之中鏈脂肪酸三酸甘油酯，較佳者為辛酸及/或癸酸以及/或月桂酸之三酸甘油酯之油脂為溶媒溶解芝麻素、表芝麻素等之木聚糖類化合物之組成物，相較於使用其他溶媒時，其因穩定含有高濃度木聚糖類化合物，故做為食品、醫藥品之價值極高。
