Science
Mechanism of Action
As a potent humectant, Potassium Lactate actively draws and retains water molecules within the stratum corneum, directly improving the skin's natural moisturizing factor (NMF) and elevating surface hydration. It functions as a conditioning agent to maintain optimal skin health and acts as a buffering agent, which is crucial for stabilizing the pH of cosmetic formulations and preserving the skin's physiological pH. Additionally, it offers mild exfoliating properties, promoting the gentle removal of senescent skin cells and encouraging the generation of new, healthy cells, without the potential irritation associated with more aggressive alpha-hydroxy acids (AHAs). Its antimicrobial attributes further contribute to skin integrity by inhibiting microorganism proliferation.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Demonstrated efficacy in increasing skin hydration by up to 20%.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The pH of a 60% Potassium Lactate solution is typically within the 6.5 to 8.5 range. Diluted solutions exhibit a basic pH, for example, 7.45 at 1 mM and 7.89 at 10 mM. As a derivative of lactic acid, formulations containing Potassium Lactate should be designed to either prevent increased sun sensitivity or explicitly advise daily sun protection. Optimal storage requires a dry, cool, and well-ventilated environment with containers kept closed.
Safety
Safety Profile
The CIR Expert Panel deems Potassium Lactate safe for consumer cosmetic products at concentrations not exceeding 10% and at a final formulation pH of 3.5 or higher. For salon products, concentrations up to 30% are considered safe at a pH of 3.0 or greater. Due to its AHA derivative nature, formulations should prevent increased sun sensitivity, or directions for use must include daily sun protection. The FDA recognizes Potassium Lactate as Generally Recognized As Safe (GRAS) for direct human food use. It is noted as a mild eye irritant.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Potassium Lactate is a valuable ingredient, offering significant hydration, gentle exfoliation, and pH regulation suitable for all skin types with a low risk of irritation or comedogenicity.
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