Lactic Acid

Our database includes 2208 products that contain Lactic Acid.

You should know

What it is



Large Pores
Dark Spots
Scar Healing




Lactic Acid is an AHA that is derived from fermenting lactose, a carbohydrate from milk. It removes the top layer of old and dead skin cells and helps increase cell turnover.

Benefits of Lactic Acid are that it can help to reduce large pores and reduce the effects of aging. Some potential downsides are that it can be bad for dry skin, cause irritation, worsen eczema, and worsen rosacea.

Not only does it help exfoliate the skin, it helps strengthen the skin's barrier. When applied, lactic acid helps the skin create ceramides.

Lactic acid is an over-the-counter chemical exfoliant that comes from the fermentation of lactose — a carbohydrate found in milk.

Legend has it that Cleopatra used to bathe in sour milk to help reduce wrinkles.

Read more about some other popular AHA's here:

Lactic Acid is a somewhat common cosmetic ingredient, with about 7.4% of the products in our database containing it.

Community Stats

1412 people from our community have liked or disliked this ingredient.

Users who like it 💖

Often have the following skin types:

Combination Dry

Usually have one or more of the following skin concerns:

Fine Lines • Texture • Dullness • Dark Spots

Users who dislike it 💔

Often have the following skin types:

Sensitive Dry

Usually have one or more of the following skin concerns:

Seborrheic Dermatitis • Sensitivity • Dryness • Redness

Where it's used

Lactic Acid is most often found as ingredient number 16 within an ingredient list.

Of the 10 products in our database that have a known concentration of Lactic Acid, we've seen concentrations from 0.1% to 10% specified within their ingredient lists.

These are the categories of products that use Lactic Acid the most:

CosIng Data

  • CosIng ID: 34809
  • INN Name: lactic acid
  • EC #:  200-018-0
  • Ph. Eur. Name: acidum lacticum
  • All Functions: Buffering, Humectant, Skin Conditioning
What is CosIng?

CosIng is the European Commission database for information on cosmetic substances and ingredients.

SkinSort uses CosIng to source some of it's data on ingredient names and functions.