Products are split into three levels based on ingredient labels

GO
Best choice
SLOW
Contains ingredients with possible health concerns
STOP
Contains harmful ingredients
STOP

OUAI

Fine To Medium Hair Treatment Masque

Last verified: April 7, 2026

  • Water (Aqua, Eau)
  • Sodium C14-16 Olefin Sulfonate
  • Cocamidopropyl Betaine
  • Sodium Methyl Cocoyl Taurate
  • PEG-200 Hydrogenated Glyceryl Palmate
  • Cocamide MIPA
  • Parfum (Fragrance)
  • Panthenol
  • Cocoglucosides Hydroxypropyltrimonium Chloride
  • Hydrolyzed Keratin
  • Biotin
  • Salvia Hispanica Seed Oil
  • Cetrimonium Chloride
  • Hydroxypropyl Guar Hydroxypropyltrimonium Chloride
  • Glycerin
  • Sodium Lauroyl Glycinate
  • PEG-150 Distearate
  • Propoxytetramethyl Piperidinyl Dimethicone
  • Trideceth-6
  • C11-15 Pareth-7
  • PEG-7 Glyceryl Cocoate
  • Sodium Chloride
  • Polyquaternium-7
  • Disodium EDTA
  • Citric Acid
  • Sodium Hydroxide
  • Tetrasodium EDTA
  • Potassium Sorbate
  • Sodium Benzoate
  • Phenoxyethanol
  • Benzyl Alcohol
  • Acetic Acid
  • Sodium Acetate
  • Benzyl Salicylate
  • Limonene
  • Hexyl Cinnamal

Why This Product is Rated STOP

Fine To Medium Hair Treatment Masque by OUAI has been evaluated by Million Marker and contains ingredients with known health concerns. This product is rated STOP, indicating higher concern.

We recommend avoiding STOP-rated products and seeking safer alternatives from our GO or SLOW categories.

Learn more about how Million Marker scores products →

Frequently Asked Questions

Fine To Medium Hair Treatment Masque by OUAI - Non-toxic Shampoos + Conditioners product rated STOP by Million Marker, free from BPA, phthalates, and parabens

Where to buy

OUAI Google Search