This is due to the male hormone testosterone – it makes men’s skin less robust and weakens its natural protective function significantly. It is recommended to leave the shampoo on the hair for at least two minutes so that all the caffeine can be absorbed into the scalp. Aqua, Sodium Laureth Sulfate, Laureth-2, Disodium Laureth Sulfosuccinate, Sodium Lauroyl Glutamate, Sodium Chloride, Caffeine, Panthenol, Parfum, PEG-120, Methyl Glucose Dioleate, Hydrolyzed Wheat Protein, Citric Acid, Sodium Citrate, Menthol, PEG-40 Hydrogenated Castor Oil, Potassium Sorbate, Polyquaternium-7, Disodium EDTA, Sodium Benzoate, Zinc PCA, Niacinamide, Limonene, Tocopherol, Phenoxyethanol, Methylparaben, Propylparaben, CI 42090, CI 60730. Aqua, Sodium Laureth Sulfate, Laureth-2, Sodium Chloride, Disodium Laureth Sulfosuccinate, Sodium Lauroyl Glutamate, Panthenol, Caffeine, Parfum, PEG-120 Methyl Glucose Dioleate, hydrolyzed Wheat Protein, Citric Acid, Sodium Citrate, Potassium Sorbate, PEG-40 Hydrogenated Castor Oil, Menthol, Polyquatemium-7, Disodium EDTA, Sodium Benzoate, Tocopherol, Phenoxyethanol, Methylparaben, propylparaben, CI 60730, CI 42090.