POLYQUATERNIUM-16
Is POLYQUATERNIUM-16 safe for seborrheic dermatitis?
There is not enough applicable evidence to make a clear general seb derm recommendation for Polyquaternium-16. Its antistatic and film-forming purposes do not establish control of scalp inflammation or scale.
A study of deodorants containing this polymer examined axillary odour and bacteria in complete formulations. Those findings do not establish an independent effect on seb derm or Malassezia, and should not become an antifungal claim. Consider the finished hair or skin product and your repeated response; ask for advice if irritation continues.
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What is it?
A quick identity check, separate from the seb derm guidance above.
01 / 05- Material type
- Cosmetic formulation polymer
- Cosmetic function
- Antistatic, Film Forming
What is POLYQUATERNIUM-16 used for in skincare?
Polyquaternium-16 is listed for antistatic action and film formation. These purposes help shape cosmetic performance, rather than defining a clinical outcome. Other numbered Polyquaternium ingredients are separate materials, and a deodorant study cannot automatically predict the behaviour of a shampoo or conditioner.