The Lab
Specimen No. 0042
CautionDerivedpreservativechelator

Citric Acid (High Concentration)

citric acid · 2-hydroxypropane-1,2,3-tricarboxylic acid · e330

Naturally derived acid used to adjust pH and act as a mild preservative. Safe at typical cosmetic concentrations, but can cause irritation and enamel erosion at high concentrations.

high confidence
Researched April 18, 2026

Concerns

  • Dental enamel erosion with oral products at high concentrations
  • Skin irritation and sensitization at concentrations above ~5%
  • Used at low levels in most products — concentration matters greatly

Sourcing & processing

naturally sourced

Commonly found in

TonerVitamin C serumExfoliantToothpasteCleaning products

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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