Sodium Lactate

Benefits
SoothingLighteningMoisturizing

What is Sodium Lactate?

Sodium lactate is the sodium salt of lactic acid, an alpha-hydroxy acid naturally present in the skin's natural moisturizing factor and sourced from fermented milk, vegetables, or corn. In cosmetics, it functions mainly as a humectant, binding water molecules to the skin's surface for sustained hydration. It also serves as a buffering agent, helping maintain a stable pH in formulations to prevent instability. With mild keratolytic action, it loosens bonds between dead skin cells, aiding gentle exfoliation and smoother texture without harshness. Typically used in concentrations under 10% in moisturizers, lotions, serums, and cleansers, it supports skin barrier integrity and enhances product feel. Its skin-identical nature promotes compatibility, making it a staple in hydrating and conditioning products for everyday routines.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1-3 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Buffering agent
Maintains the pH stability of a formulation.
Exfoliant
Helps remove dead surface cells to smooth texture and enhance radiance; can be physical (particles) or chemical/enzymatic depending on the ingredient type.
Humectant
Attracts and holds water in the stratum corneum, boosting hydration and plumpness; commonly used in moisturizers, cleansers, and hair conditioners.
Keratolytic
Promotes shedding of thickened, rough skin by loosening keratin bonds, useful in smoothing, anti-dandruff, and callus-targeting treatments.

Benefits

Enhances skin hydration by drawing in and locking moisture.

Calms and soothes minor irritations for comfort.

Promotes even tone through mild exfoliation.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
People with dry or dehydrated skin needing moisture boost.
Anyone with allergies to lactic acid or its salts.
Those with irritated skin seeking calming effects.
People experiencing active skin barrier damage.
Individuals wanting gentle smoothing and brighter appearance.
Those sensitive to humectants in humid climates.

Safety Notes

  • Generally recognized as safe in cosmetics at typical use levels.
  • Low comedogenic potential, unlikely to clog pores.

Frequently Asked Questions about Sodium Lactate

What does sodium lactate do in skincare?

It attracts moisture to hydrate skin, buffers pH for stability, and mildly exfoliates for smoother texture.

Is sodium lactate safe for sensitive skin?

Yes, it's generally mild and soothing, with low irritation potential from authoritative reviews.

Can sodium lactate help with dry skin?

It supports hydration as a humectant, complementing dry skin care routines.