The Ordinary - Lactic Acid 10% + HA - is a water-based preparation with alpha-hydroxy acid, that is, lactic acid, which effectively exfoliates the skin surface, cleanses and deeply moisturizes. Exfoliation is also promoted by purified Tasmanian pepper extract with a proven effect of reducing irritation and hypersensitivity, which may be associated with the use of acids. The moisturizing action is supported by hyaluronic acid, which also increases skin elasticity. The pH value of the product is approximately 3.8. Lactic acid has a pKa value of 3.8 - an important parameter in the development of acid products. The pKa value determines the strength of the acid.A more delicate formula of this peeling with lactic acid 5% is available here.Active components:Hyaluronic acid - responsible for skin moisturizing,Lactic acid - moisturizes, has antibacterial and anti-aging properties, acts as a pH regulator.How to use: Apply once a day, preferably in the evening. Apply a small amount of the product to cleansed and dry skin of the face, neck and décolleté. Do not rinse off. Do not use several acidic products at the same time. The peeling can be diluted with other products to reduce the intensity of action until the skin's tolerance to acids increases. Avoid contact with eyes. If persistent irritation occurs - discontinue use and consult a doctor. This product contains alpha-hydroxy acid (AHA), which can increase skin sensitivity to sunlight and, in particular, the likelihood of sunburn. Use sunscreen and limit sun exposure while using this product and for one week after completion.Ingredients: Aqua (Water), Lactic Acid, Glycerin, Pentylene Glycol, Propanediol, Sodium Hydroxide, Sodium Hyaluronate Crosspolymer, Tasmannia Lanceolata Fruit/Leaf Extract, Hydroxyethylcellulose, Isoceteth-20, Trisodium Ethylenediamine Disuccinate, Ethylhexylglycerin, 1,2-Hexanediol, Caprylyl Glycol.