Snapshot
- Overview
- A preservative used at low levels to keep water-based products fresh.
- Category
- Preservative
- Type
- Preservative
Polyaminopropyl Biguanide
Polyaminopropyl Biguanide (PHMB) is a water-soluble polymeric preservative used at very low levels in cosmetics and toiletries. It's chosen to control product contamination in aqueous systems, though regulatory acceptance and efficacy data vary by region.
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Our take
Is Polyaminopropyl Biguanide a Good Ingredient?
Rated Fair because it preserves water-based products effectively at very low levels, but regional acceptance and data are mixed, and it carries some irritation/sensitization risk.
What it does
Skin Benefits
Helps keep water-based products fresh by suppressing microbial growth at very low levels. Regulatory acceptance and sensitivity can vary, so cautious use may be advisable.
Where you'll find it
Uses in Skincare & Cosmetics
Common in toners, essences, and micellar waters, as well as gels and sheet-mask solutions. Also used at low levels in water-heavy cleansers and moisturizers.
Before you use it
Safety
Can trigger irritation or sensitization in some individuals, particularly on compromised skin or near the eyes; patch test if unsure. Typically used at very low concentrations and should be kept out of direct ocular contact.
Products with Polyaminopropyl Biguanide
