Reduced coenzyme q10 composition and production method for the same

A production method of reduced coenzyme Q10 composition comprising:

• separating, from a solution comprising reduced coenzyme Q10, reduced demethoxy Q10 (RD), and reduced coenzyme Q9 (RQ9), a composition in solid form comprising the reduced coenzyme Q10, the reduced demethoxy Q10, and the reduced coenzyme Q9,
• wherein a peak area ratio (RD/RQ9) of a peak containing the reduced demethoxy Q10 (RD) having a relative retention time (RRT) relative to a retention time (RT) of a peak top of the reduced coenzyme Q10 of 0.88 to 0.94 to a peak containing the reduced coenzyme Q9 (RQ9) having the relative retention time (RRT) of 0.69 to 0.73 in a chromatogram of the composition is 0.3 or more,
• wherein the chromatogram of the composition after the separation is obtained by high performance liquid chromatography under conditions in which
• a column is a C18 column (150 mm in length and 4.6 mm in inner diameter),
• a mobile phase composition is CH3OH:C6H14 at 9:1 (v/v),
• a mobile phase flow rate is 1 mL/min, and
• a detection wavelength is 190 nm.