Olaplex No.0: Wasser, Bis-Aminopropyl-Diglykoldimaleat, Natriumbenzoat, Penoxyethanol. Olaplex No.3:Water (Aqua), Bis-Aminopropyl Diglycol Dimaleate, Propylene Glycol, Cetearyl Alcohol, Behentrimonium Methosulfate, Phenoxyethanol, Cetyl Alcohol, Glycerin, Hydroxyethyl Ethylcellulose, Stearamidopropyl Dimethylamine, Quaternium-91, Sodium Benzoate, Cetrimonium Methosulfate, Cetrimonium Chloride, Fragrance (Parfum), Tetrasodium EDTA, Polyquaternium-37, Benzyl Benzoate, Etidronic Acid, Ascorbic Acid, Phytantriol, Tocopheryl Acetate, Aloe Barbadensis Leaf Juice, Panthenol, Simmondsia Chinensis (Jojoba) Seed Oil, Citric Acid, Potassium Sorbate. Olaplex No.4P: Water (Aqua/Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Glycerin, Sodium Cocoamphoacetate, Sodium Chloride, Acrylates Copolymer, Betaine, Phenoxyethanol, Fragrance (Parfum), Polyquaternium-7, Bis-Aminopropyl Diglycol Dimaleate, Guar Hydroxypropyltrimonium Chloride, Ethylhexylglycerin, Hexyl Cinnamal, Limonene, Citric Acid, Sodium Benzoate, Acid Violet 43 (Cl 60730). Olaplex No.8: Water (Aqua/Eau), Dimethicone, Cetyl Alcohol, Persea Gratissima (Avocado) Oil, Glycerin, Stearyl Alcohol, Ethylhexyl Olivate, Behentrimonium Chloride, Cetrimonium Bromide, Limnanthes Alba (Meadowfoam) Seed Oil, Oryza Sativa (Rice) Bran Oil, Quaternium-80, Rosa Canina (Rose Hip) Seed Extract, Ceramide AP, Ceramide NP, Hydrolyzed Jojoba Esters, Hyaluronic Acid, Sodium PCA, Bis-Aminopropyl Diglycol Dimaleate, Arginine, Cannabis Sativa (Hemp) Seed Oil, Jojoba Esters, Panthenol,Squalane, Carthamus Tinctorius (Sunflower) Seed Oil, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Guar Hydroxypropyltrimonium Chloride, Histidine, Hydroxyethylcellulose, Phenylalanine, Aspartic Acid, PCA, Phosphatidylcholine, Citric Acid, Sodium Lactate, Ethylhexyglycerin, Sodium Benzoate, Phosphatidylcholine, Bis-Ceteraryl Amodimethicone, Fragrance (Parfum), Citral, Hexyl Cinnamal, Limonene.