Science
Mechanism of Action
This ingredient functions by penetrating microbial cell membranes, disrupting their structural integrity. This interference inhibits crucial enzymatic activities necessary for cellular energy production and reproduction, effectively preventing microbial growth and subsequent product spoilage.
Research
Clinical Evidence
High confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Optimal activity for Potassium Sorbate occurs in acidic environments, ideally within a pH range of 3.0–6.5, with peak efficacy below pH 5 and at pH 4.4. It is susceptible to UV light and oxidation, which can lead to discoloration or reduced effectiveness; therefore, co-formulation with gluconolactone for color stabilization and an antioxidant for oxidative stability is recommended. Exposure to extreme heat may also diminish its preservative capacity.
Synergies
- Gluconolactone (for color stabilization)
- Antioxidants (for oxidative stability)
Conflicts
- strong oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded in 2017 that Potassium Sorbate is safe for cosmetic use at concentrations up to 0.6%. It has also been recognized as Generally Recognized As Safe (GRAS) by the FDA for food applications and is approved for cosmetic use in Europe, underscoring its broad safety profile. Earlier assessments indicated a low irritancy potential even at significantly higher concentrations (up to 10%).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Potassium Sorbate is an essential ingredient for maintaining product stability and safety across all skin types, attributed to its robust antimicrobial properties and well-established low risk profile.
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References
Sources