Body & Beauty / Compounds / Polystyrene microbeads

Polystyrene microbeads on your skin: a safety profile

Moderate risk

(People-specific data is limited; this page draws from human adult context.) Formerly common in exfoliating scrubs, toothpaste, and cosmetics. Banned in many jurisdictions but legacy environmental load persists. Styrene monomer leaching is primary chemical concern (IARC 2B carcinogen). Adsorb hydrophobic pollutants (PAHs, PCBs) concentrating them 100-1,000,000x ambient water levels.

What is polystyrene microbeads?

Also known as: PS microbeads, Cosmetic microbeads, Exfoliant beads, Microbead pollution.

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Risk for people

Moderate risk

Formerly common in exfoliating scrubs, toothpaste, and cosmetics. Banned in many jurisdictions but legacy environmental load persists. Styrene monomer leaching is primary chemical concern (IARC 2B carcinogen). Adsorb hydrophobic pollutants (PAHs, PCBs) concentrating them 100-1,000,000x ambient water levels.

Regulatory consensus

3 regulatory and scientific bodies have classified Polystyrene microbeads. The classifications differ — that's the data.

AgencyYearClassificationNotes
US2015Microbead-Free Waters Act — banned in rinse-off cosmetics
EU2023Microplastics Regulation (EU) 2023/2055 — banned intentionally added microplastics in cosmetics
UK2018Environmental Protection (Microbeads) (England) Regulations — manufacture and sale ban

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where you encounter polystyrene microbeads

  • Personal Care
  • Industrial
  • Environment

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Polystyrene microbeads:

  • Jojoba wax beads
    Trade-offs: Softer exfoliation. Melt at body temperature → less abrasive. May clog some formulation equipment.
    Relative cost: 5-8×
  • Cellulose microbeads (Naturbeads)
    Trade-offs: Biodegradable in marine environment. Lower mechanical hardness. May swell in formulation.
    Relative cost: 3-5×

Frequently asked questions

Why do regulators disagree about polystyrene microbeads?

Polystyrene microbeads has been classified by 3 agencies including US, EU, UK, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.

See Polystyrene microbeads in the body app

Look up products containing polystyrene microbeads, compare to alternatives, and explore the full data record.

Open in body View raw API data

Sources (1)
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Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →