The Lab
Specimen No. 0144
CautionDerivedsurfactant

Cocamidopropyl Betaine (CAPB)

cocamidopropyl betaine · capb · coco betaine

A coconut-derived amphoteric surfactant used in rinse-off cleansers to boost foam and soften the cleansing action of harsher surfactants. Generally safe in rinse-off products, but can contain sensitizing impurities (DMAPA, amidoamine) that cause contact dermatitis in susceptible individuals.

medium confidence
Researched April 18, 2026

Concerns

  • Skin sensitization from DMAPA and amidoamine impurities during synthesis
  • Eye irritation — avoid contact with eyes
  • Leave-on use limited to 3% due to sensitization risk
  • Contact dermatitis reported in clinical patch-test studies

Sourcing & processing

plant derived

Regulatory flags

  • Known contact sensitizer — CAPB-related compounds cause allergic contact dermatitis

Commonly found in

ShampooBody washFacial cleanserBaby washHand soap

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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