Aluminum PCA
INCI: ALUMINUM PCA
A lightweight astringent that helps refine skin texture and minimise excess oil
Best For Skin Types
Oily, Combination
Addresses
Usage Frequency
Daily
What Is Aluminum PCA?
Aluminium PCA is the aluminium salt of pyroglutamic acid (also called PCA or 5-oxoproline), a naturally occurring amino acid derivative found in skin. It functions as an astringent and skin conditioning agent, working to tighten the appearance of pores and reduce the visible effects of excess sebum on the skin's surface.
This ingredient appears in a small proportion of skincare formulations (approximately 0.1% of products), typically used at low concentrations to deliver its astringent properties without over-drying the skin.
How It Works
Aluminium PCA works primarily through an astringent mechanism. When applied to skin, it causes a temporary contraction of pores and skin tissue, which can minimise their visible appearance and help mattify oily areas. This occurs without disrupting the skin barrier or causing unnecessary dehydration.
The ingredient's conditioning properties help balance this tightening effect, so the skin is not left feeling tight or uncomfortable—a characteristic that distinguishes it from harsher astringents.
Clinical Evidence & References
Published clinical research on Aluminium PCA specifically is limited. Most evidence supporting astringent ingredients comes from broader studies on aluminium salts and their effects on sebum control and pore appearance rather than controlled trials of this particular compound.
The ingredient's astringent and conditioning properties are consistent with its chemical profile and established use in cosmetics, though individual results may vary. Those seeking robust evidence for a particular skin concern should consult dermatological literature on astringent ingredients more broadly.
Published Research
How to Use
Aluminium PCA is typically found in formulations designed for oily or combination skin, such as toners, serums, or lightweight moisturisers. It can be used daily as part of your routine, though as with all astringents, it is sensible to introduce it gradually if you have sensitive skin and discontinue if any irritation occurs. Pairing it with a hydrating product can help maintain skin comfort.
Safety & Precautions
How widely it's used
Regulatory information
Standardised cosmetic-ingredient identifiers used by regulators.
Show identifiers
- INCI Name
- ALUMINUM PCA
- EC Number
- 261-931-8
- Function
- Astringent, Skin Conditioning
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