Aminopropyl Kojyl Phosphate
INCI: AMINOPROPYL KOJYL PHOSPHATE
Reviewed by Emma · Last updated 2 Jun 2026
A phosphorylated kojic acid derivative used to condition and support skin
Best For Skin Types
All
Addresses
Usage Frequency
Daily
What Is Aminopropyl Kojyl Phosphate?
Aminopropyl Kojyl Phosphate is a modified form of kojic acid, a naturally occurring compound derived from fungi. By attaching an aminopropyl phosphate group to kojic acid, this ingredient is designed to improve stability and skin penetration compared to kojic acid alone.
In formulations, it functions as a skin conditioning agent, working to support the skin's surface texture and overall condition. It is used in concentrations that vary depending on the product type and intended benefit.
How It Works
As a modified kojic acid derivative, Aminopropyl Kojyl Phosphate is believed to work by interfering with tyrosinase activity—an enzyme involved in melanin production. The phosphorylation and aminopropyl modification may enhance its ability to penetrate the skin and remain stable in formulations.
By modulating melanin synthesis, it may help address uneven pigmentation and support a more uniform skin tone over time with consistent use.
Clinical Evidence & References
Evidence on Aminopropyl Kojyl Phosphate specifically is limited in the peer-reviewed literature. Most data comes from ingredient supplier studies and cosmetic efficacy trials rather than independent clinical research. These studies generally suggest the ingredient performs comparably to kojic acid whilst offering improved formulation stability.
More robust, independent clinical trials would be needed to confirm long-term efficacy and safety in diverse skin populations. If you are considering this ingredient for a specific concern—such as hyperpigmentation—it is worth discussing expectations with a skincare professional.
How to Use
This ingredient is typically found in serums, toners, and treatment products. Apply to cleansed skin, either morning or evening, depending on the formulation. If layering with other actives, allow each product to absorb fully before applying the next. Start with 2-3 times per week if your skin is sensitive, then increase frequency as tolerated.
Safety & Precautions
Frequently Asked Questions
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