About the product

Lactic acid is an alpha hydroxy acid that exfoliates the skin. This combination offers 5? Ultra-light exfoliation backed by pure Tasmanian pepper known for its ability to reduce signs of inflammation and sensitivity often associated with exfoliation

This formula contains a Tasmanian pepper derivative studied to help reduce irritation associated with acid use. This derivative is of vegetable origin and varies in color seasonally and this color difference may be evident in the formula from time to time.

Contraindications: Lactic acid should not be used on sensitive, scaly or at-risk skin. Please refer to the additional sun protection note and other warnings in the instructions provided.

This pH of this formula is about 3.8. Lactic Acid has a pKa of 3.8 and the pKa is the most important aspect to consider when forming acids. pKa means acid availability. When the pKa approaches the pH, there is a perfect balance between salt and acidity, which increases the effectiveness of the acid and reduces irritation. Higher pH numbers in such a case may lead to more salt making the formula more irritating than if the formula were more acidic.

Note: While lactic acid can lead to quick visible benefits, we generally suggest indirect forms of skin exfoliation in favor of direct forms like this formula due to the potential inflammation and sensitivity associated with the acids. Please refer to the non-acidic NIOD precursor for such reference.

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Apply once a day, preferably in the evening. May be diluted with other treatments to reduce strength until skin develops tolerance. Do not use on sensitive, flaky or compromised skin. Avoid contact with eyes. Skin contact should be limited in frequency or duration. If irritation occurs, discontinue use and consult a physician. Use only as directed on unbroken skin. It is recommended to test the patch before use. keep away from the reach of the children. Sunburn Warning: This product contains an alpha hydroxy acid (AHA) that may increase your skin's sensitivity to the sun, especially the possibility of sunburn. Use sunscreen, wear protective clothing, and limit sun exposure while using this product and for a week afterward.

Sunburn Warning: This product contains an alpha hydroxy acid (AHA) that may increase your skin's sensitivity to the sun, especially the possibility of sunburn. Use sunscreen, wear protective clothing, and limit sun exposure while using this product and for a week afterward.

Learn how to combine multiple combinations of The Ordinary into one system

View package disposal instructions

Patch tests are an easy way to help predict whether you might experience an initial adverse reaction to a new product. It is recommended that you perform patch testing before incorporating any new product into your system. We've outlined a general way to do your patch test below based on the type of product.

Apply a small amount of the product to a clean area of ​​skin on the upper part of the forearm.

Keep the area dry.

If the product has a specified duration of use, rinse it out after this time has elapsed. Otherwise, rinse it off after 24 hours.

If any redness, burning, itching, blistering, or irritation is observed at any time during the test, do not use the product.

For more product-specific information, see our patch test guide.

Ingredients

Aqua (Water), Lactic Acid, Glycerin, Pentylene Glycol, Propanediol, Sodium Hyaluronate Polymer, Tasmannia Lanceolata Fruit/Leaf Extract, Senegal Gum, Xanthan Gum, Isoceteth-20, Trisodium Ethylene Dioxinate, Sodium Hydroxide, Ethylhexylhexaneglycanidiol, .

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