DESCRIZIONE
Crystal of reduced coenzyme Q10 excelling in stability; and a composition containing reduced coenzyme Q10 crystal. Reduced coenzyme Q10 crystal that exhibits an X-ray diffraction pattern with Cu-Kα ray different from that of conventional reduced coenzyme Q10 crystal and excels in stability can be obtained by dissolving reduced coenzyme Q10 in an oil or fat and cooling the solution. This crystal also excels in bioabsorbability.