In this study, we showed the bioavailability of ubiquinol (QH) in the form of water-dispersive powder.Two groups of 5 healthy young subjects received single oral administration of 100 mg of QH in the form of a soft capsule containing QH dissolved in safflower oil or 40% water-dispersive powder in the fasting period, and changes in the plasma QH concentration were monitored over time.The water-dispersive powder form of QH exhibited superior bioavailability even when administered in the fasting period.