The present invention relates to a method forstabilizing reduced coenzyme Q10, which is useful as aningredient in good foods, functional nutritive foods,specific health foods, nutritional supplements, nutrients,animal drugs, drinks, feeds, cosmetics, medicines, remedies,preventive drugs, etc., and to a composition therefor.The composition comprises reduced coenzyme Q10, a fat andoil (excluding olive oil) and/or a polyol, and doesn'tsubstantially inhibit the stabilization of reduced coenzymeQ10. Additionally, the composition is a reduced coenzymeQ10-containing composition which comprises reduced coenzymeQ10, a polyglycerol fatty acid ester, and a fat and oiland/or a polyol.
