A method for the stabilization of the reduced coenzyme Q10 comprising the achievement of the co-presence of the reduced coenzyme Q10 and the following (a) and / or (b): (a) of not less than 1.5% by weight a no more than 99% by weight of reduced coenzyme Q9 with respect to reduced coenzyme Q10, and / or (b) reduced coenzyme Q11.Un método para la estabilización de la coenzima reducida Q10 que comprende la consecución de la copresencia de la coenzima reducida Q10 y lo siguiente (a) y/o (b): (a) de no menos del 1,5% en peso a no más del 99% en peso de coenzima reducida Q9 con respecto a la coenzima reducida Q10, y/o (b) coenzima reducida Q11.