Lactoperoxidase
What is Lactoperoxidase?
Lactoperoxidase is a naturally occurring glycoprotein enzyme from the peroxidase family, primarily sourced from bovine milk but also present in human saliva, tears, and mucosal secretions. It serves as a key component of the innate immune system by generating antimicrobial compounds. In cosmetics, especially natural and oral care formulations, it functions within an enzymatic preservation system alongside hydrogen peroxide and thiocyanate. The enzyme catalyzes the oxidation of thiocyanate to form hypothiocyanite, a potent yet selective antimicrobial agent that targets bacteria and fungi without disrupting beneficial skin flora. This mechanism extends product shelf life and maintains formulation integrity. Beyond preservation, its skin conditioning properties help support moisture retention and barrier function, while its stabilizing role prevents emulsion breakdown and ingredient degradation over time.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Promotes skin softness, smoothness, and flexibility through conditioning action.
Enhances physical and chemical stability to ensure consistent product performance.
Offers gentle support against microbial growth in formulations.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Individuals seeking natural enzymes in skincare for conditioning benefits. | People with known allergies to milk-derived enzymes. |
| Users of sensitive skin products preferring mild stabilizers. | Individuals sensitive to peroxidase enzymes. |
| Those interested in enzyme-based preservation systems for cosmetics. | Those with specific dairy protein intolerances. |
Safety Notes
- Recognized as low hazard in cosmetic safety evaluations.
- Typically well-tolerated with minimal risk of adverse reactions.
Frequently Asked Questions about Lactoperoxidase
What is lactoperoxidase?
A natural enzyme from milk that acts as a skin conditioner and stabilizer in cosmetics via antimicrobial oxidation.
Is lactoperoxidase safe for skin?
It has a low safety hazard rating and is generally well-tolerated in formulations.
What role does it play in products?
It maintains skin flexibility and improves formula stability against degradation.