SkinCeuticals Blemish + Age Defense Serum contains: Alcohol Denat, Aqua/Water, Methylpropanediol, Glycolic Acid, Diisopropyl Adipate, Octadecenedioic Acid, Salicylic Acid, Hydroxyethylpiperazine, Ethane Sulfonic Acid, Citric Acid, Capyloylsalicylic Acid, Sodium Hydroxide, Polyquaternium-10, D43561/1.