Potassium Lactate

What is Potassium Lactate?

Potassium lactate is the potassium salt of lactic acid, a naturally occurring alpha-hydroxy acid produced through the fermentation of sugars like corn or beets. In skincare, it appears in moisturizers, serums, cleansers, and lotions. As a humectant, it draws moisture from the environment into the skin's upper layers, promoting hydration. It acts as a buffering agent by maintaining optimal pH levels in formulations, ensuring product stability and gentle application. With mild exfoliating properties derived from its lactic acid base, it supports smoother texture by aiding natural cell renewal without harsh abrasion. Additionally, it functions as a skin conditioning agent, enhancing softness and flexibility by improving moisture retention in the stratum corneum. This multifunctional ingredient suits water-based products, contributing to overall formulation efficacy and skin feel.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 4 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.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

- Draws and binds water to skin for improved hydration and plumpness.

- Stabilizes product pH to prevent instability and ensure gentle use.

- Softens and smooths skin surface for better texture and comfort.

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 seeking moisture boost.
- Individuals with known sensitivity to lactic acid derivatives.
- Users of pH-sensitive formulations needing stability.
- People with compromised skin barriers prone to reactions.
- Those desiring mild conditioning without heavy occlusives.
- Those preferring to minimize ingredients with limited long-term data.

Safety Notes

  • - Deemed safe for cosmetic use by regulatory reviews with low risk at typical concentrations.
  • - Non-comedogenic, unlikely to clog pores in most formulations.

Frequently Asked Questions about Potassium Lactate

What is potassium lactate?

A potassium salt of lactic acid used in skincare for hydration, pH control, and conditioning.

Is it safe for daily use?

Generally safe in cosmetics at typical levels, with low irritation and non-comedogenic profile.

Does it exfoliate skin?

Offers mild exfoliation by supporting cell turnover, gentler than free lactic acid.