The present application provides a photodegradation inhibitor of pyrroloquinoline quinone and/or salts thereof, which comprises, as an active ingredient, one or more pigments selected from the group consisting of tar dye, safflower yellow pigment, cochineal pigment, purple sweet potato pigment, red radish pigment, green coloring material, gardenia blue pigment and caramel pigment.本發明為提供一種含有作為有效成分的選自由焦油染料(Tar dye)、紅花(Safflower)黃色素、胭脂紅(Cochineal)色素、紫薯(Purple potato)色素、紅大根(Red radish)色素、綠色著色料、梔子藍(Gardenia blue)色素及焦糖(caramele)色素所成群的1種或複數種的色素之吡咯喹啉醌(Pyrroloquinoline quinone)及/或其鹽的光劣化抑制劑。
