Best For Skin Types
All, Dry, Mature, Sensitive
Addresses
Usage Frequency
Daily
What Is Polyglycerin-3?
Polyglycerin-3 is a humectant derived from glycerin, a naturally occurring compound found in plant and animal sources. It works by attracting water molecules from the environment and deeper skin layers, helping to bind moisture to the outer layers of skin.
As a humectant, its primary function is hydration. It is used in relatively small concentrations across skincare formulations and is considered a gentle, well-tolerated ingredient suitable for various skin types.
Benefits for Your Skin
How It Works
Polyglycerin-3 functions as a humectant, meaning it has a chemical structure that attracts water molecules. When applied to skin, it draws moisture from the dermis (deeper skin layers) into the epidermis (outer layers), and can also absorb moisture from humid environments.
This hydration mechanism helps to plump the stratum corneum (the outermost layer), which may temporarily improve skin texture and support the skin barrier—a key component of healthy skin function as we age.
Clinical Evidence & References
Research on skin ageing emphasises the importance of maintaining skin hydration and barrier function as part of healthy skin physiology. A compromised barrier and reduced moisture levels are associated with visible ageing, sensitivity, and impaired healing. Humectants like polyglycerin-3 support these protective functions through hydration.
Whilst polyglycerin-3 specifically has limited dedicated clinical studies, the humectant class of ingredients has a well-established role in skincare. The evidence supports hydrating ingredients as foundational in skincare routines, particularly for mature or compromised skin.
How to Use
Polyglycerin-3 is typically used as part of formulated products rather than standalone ingredients. For best results, apply hydrating products containing this ingredient to clean, slightly damp skin—this helps the humectant draw moisture into the skin more effectively. It works well as part of a broader skincare routine that includes a moisturiser and, where appropriate, an occlusive product to seal in hydration.
Safety & Precautions
Frequently Asked Questions
From the Clinic
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Polyglycerin-10
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Polyglycerin-6
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