The Lab
Specimen No. 0177
AvoidSyntheticfood synthetic preservatives

Potassium Benzoate

E212

A synthetic preservative used in olives, caviar, and some beverages. Like sodium benzoate, it can form benzene under certain conditions.

low confidence
Researched July 7, 2026

Concerns

  • Has been associated with benzene formation under certain conditions, by the same mechanism as sodium benzoate

Regulatory flags

  • IARC Class: Gr1 (via benzene formation)
  • EDC Status: None
  • Regulatory: Same gap as sodium benzoate
  • Evidence Grade: A

Commonly found in

Olives, caviar, some beverages

Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.

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LabelCleared verdict badge: Potassium Benzoate — Avoid
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