Azelaic Acid/Polyglyceryl-3 Copolymer
INCI: AZELAIC ACID/POLYGLYCERYL-3 COPOLYMER
Reviewed by Daisy · Last updated 2 Jun 2026
A stabilised form of azelaic acid designed for hair and scalp conditioning
Best For Skin Types
All
Addresses
Usage Frequency
Daily
What Is Azelaic Acid/Polyglyceryl-3 Copolymer?
Azelaic Acid/Polyglyceryl-3 Copolymer is a modified version of azelaic acid, a naturally occurring saturated dicarboxylic acid. In this formulation, azelaic acid is combined with polyglyceryl-3, a conditioning polymer that improves its compatibility and performance in hair and scalp products. The copolymer structure makes the ingredient more stable and easier to incorporate into cosmetic formulations.
Unlike free azelaic acid, which is primarily used in skincare, this copolymer version is optimised for hair conditioning and scalp health applications. It functions as a conditioning agent while retaining some of the properties associated with azelaic acid.
How It Works
The polyglyceryl-3 component functions as a conditioning polymer that adheres to the hair shaft, creating a protective film. This layer smooths the cuticle structure of hair, reducing moisture loss and improving overall appearance and feel.
The azelaic acid component contributes antimicrobial and antioxidant properties, which may support scalp health, though in this copolymer form the emphasis is on the conditioning action rather than the exfoliating or anti-inflammatory benefits seen with free azelaic acid in skincare.
Clinical Evidence & References
Research specifically on this copolymer in hair and scalp applications is limited. Most published evidence centres on free azelaic acid in dermatological and skincare contexts, where it has demonstrated anti-inflammatory and antimicrobial activity. The conditioning benefits attributed to the polyglyceryl-3 component are based on polymer chemistry and cosmetic performance standards rather than clinical trials.
When considering this ingredient for scalp health, evidence is primarily anecdotal or derived from in-vitro testing. Users with scalp concerns such as sensitivity or irritation should monitor their response, as individual tolerance varies.
How to Use
This ingredient is typically used as part of a formulated shampoo, conditioner, or scalp treatment rather than in isolation. Follow the product instructions for frequency and application. For best results, apply to damp hair and allow adequate contact time with the scalp or hair before rinsing. If combining with other active ingredients, ensure they are compatible and follow the product guidance to avoid overloading the scalp.
Safety & Precautions
Frequently Asked Questions
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