The Ordinary The Ordinary Lactic Acid 5% + HA alpha hydroxy acid (AHA) serum for mild exfoliation The Ordinary Swatch of The Ordinary Lactic Acid 5% + HA AHA exfoliating serum

Lactic Acid 5% + HA

A mild lactic acid superficial peeling formulation

6.50 CAD
Lactic Acid is an alpha hydroxy acid that exfoliates the skin. This 5% formulation offers very mild exfoliation and is supported with a purified Tasmanian pepperberry known to reduce signs of inflammation and sensitivity that is often associated with exfoliation.

This formula contains a studied Tasmanian Pepperberry derivative to help reduce irritation associated with acid use. This derivative is of plant origin and varies in colour seasonally and this colour variation may be apparent in the formula from time to time.

Contraindications: Lactic Acid should not be used on sensitive, peeling or compromised skin. Please refer to additional sun protection note and other warnings in provided Directions.

This pH of this formula is approximately 3.8. Lactic Acid has a pKa of 3.8 and pKa is the most important aspect to consider in formulating with acids. pKa implies acid availability. When pKa is close to pH, there is an ideal balance between salt and acidity, maximizing effectiveness of the acid and reducing irritation. Higher pH numbers in such a case would increase salt which counter-intuitively would make the formula even more irritating than if the formula was more acidic.

Note: While Lactic Acid can result in quick visible benefits, we generally suggest indirect forms of skin exfoliation in favour of direct forms such as this formula due to potential inflammation and sensitivity associated with acids. Please refer to NIOD's Non-Acid Acid Precursor for such a reference. 
Apply once per day, ideally in the PM. Can be diluted with other treatments to reduce strength until skin develops tolerance. Do not use on sensitive, peeling or compromised skin. Avoid contact with eyes. Contact of the product with the skin must be of limited frequency or duration. If irritation occurs, cease use and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised. Keep out of reach of children. Sunburn Alert: This product contains an alpha hydroxy acid (AHA) that may increase your skin's sensitivity to the sun and particularly the possibility of sunburn. Use a sunscreen, wear protective clothing, and limit sun exposure while using this product and for a week afterwards.

Sunburn Alert: This product contains an alpha hydroxy acid (AHA) that may increase your skin's sensitivity to the sun and particularly the possibility of sunburn. Use a sunscreen, wear protective clothing, and limit sun exposure while using this product and for a week afterwards. See how to combine multiple formulations from The Ordinary in a single regimen

Patch tests are an easy way to help predict if you may experience a negative initial reaction to a new product. It is recommended to perform a patch test before incorporating any new product into your regimen. We have outlined a general method for conducting your own patch test below based on the type of product.

  • Apply a small amount of the product onto a clean area of skin on the upper forearm.
  • Keep the area dry.
  • If the product has a specified duration of use, rinse off after this time has elapsed. Otherwise rinse off after 24 hours.
  • If any redness, burning, itching, blistering or irritation is observed at any time throughout the test, do not use the product.

For more product specific information, review our Patch Testing Guide.

Aqua (Water), Lactic Acid, Glycerin, Pentylene Glycol, Propanediol, Sodium Hyaluronate Crosspolymer, Tasmannia Lanceolata Fruit/Leaf Extract, Acacia Senegal Gum, Xanthan Gum, Isoceteth-20, Trisodium Ethylenediamine Disuccinate, Sodium Hydroxide, Ethylhexylglycerin, 1,2-Hexanediol, Caprylyl Glycol.

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Rated 5 out of 5 by from super Produkt ich benutze das Produkt schon seit einiger Zeit und bin sehr zufrieden , ich habe fettige Gesichtshaut, und sehe nach dem Auftragen des Peeling klar , erfrischend und strahlend aus, meine Haut verträgt das Produkt super , zudem trage ich das Produkt an meine Arme auf, dort habe ich alte Pickelnarben und U Daumen hoch , für die Wirkstoffe und das Preisverhältnis
Date published: 2021-05-01
Rated 5 out of 5 by from Excellent and fast-acting! I wanted a mild chemical exfoliator for my combination skin which has been extremely sensitive as of late. After a month of using every other day at night followed by lots of moisturizer I noticed a great deal of improvement in my melasma and my skin has never felt so smooth. Thank you The Ordinary for making incredible skin products at such great prices!
Date published: 2021-04-28
Rated 5 out of 5 by from A very gentle, but effective exfoliator. This serum is so thin and spreadable, it feels hydrating on the skin. It feels amazing and leaves the skin feeling soft and smooth. It’s a gorgeous acid exfoliator that isn’t harsh on the skin. Over time it has helped to even out my skin in all ways, including evening my skin tone and getting rid of texture.
Date published: 2021-04-26
Rated 4 out of 5 by from Not sure yet I have just started using it a couple of weeks ago, but would appreciate a manufacturer's suggestion whether or not the acid should be used under the eyes and on the lids. I am 50 and my skin is not super sensitive or dry. Nevertheless, I am not sure if this serum is meant to be used around the eyes. Thanks.
Date published: 2021-04-18
Rated 5 out of 5 by from ... An aqueous serum that absorbs immediately leaving the skin fresh and not dry.It has a light exfoliation that is good for me who have no particular acne problems but only dilated pores and oily skin.I use it on alternate days in the evening or at PM then adding moisturizers.After a few months' use the skin appears brighter, less oily and more homogeneous.The vial lasts a long time because a few drops are enough.In addition, it can also be used every day because it also has a moisturizing power.
Date published: 2021-01-30
Rated 5 out of 5 by from ... THIS STUFF IS THE BEST!!! I used to use the niacinamide+zinc but it didn’t do anything for me so I tried this instead. It doesn’t irritate my sensitive skin, cleared acne, has made my skin SO SMOOTH, and got rid of tiny bumps on forehead. I use this product with Marula oil every night and the results have been amazing, thank you the ordinary!
Date published: 2021-01-24
Rated 5 out of 5 by from ... I absolutely ADORE this product! I'm new to acids and I have very dry, sensitive skin with enlarged pores. I was afraid to try stronger acid, so I decided to buy this acid with the smallest concentration and I do not regret it! This makes my skin sooo smooth and it helped me with the overall texture of my skin and it doesn't dry out my skin at all! 11/10
Date published: 2021-01-10
Rated 5 out of 5 by from ... Este producto es ideal para mi piel, ya que al ser el de 5%, no irrita mi piel ya que es sensible. Empecé a incluirlo en mi rutina de noche poco a poco, y actualmente lo uso todas las noches. Noto mi piel con una textura como nunca antes, suave, con los poros reducidos y brillante. Este producto es genial!
Date published: 2021-01-07
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