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

REDKEN 5TH AVENUE NYC

One United Leave-In Conditioner

Last verified: May 13, 2026

  • Aqua / Water / Eau
  • Cocos Nucifera Oil / Coconut Oil
  • Amodimethicone
  • Polyquaternium-37
  • Phenoxyethanol
  • Propylene Glycol Dicaprylate / Dicaprate
  • Parfum / Fragrance
  • Acetamide MEA
  • Lactamide MEA
  • Dimethicone PEG-7 Phosphate
  • PPG-1 Trideceth-6
  • Trideceth-6
  • Behentrimonium Chloride
  • Xylose
  • Lactic Acid
  • Ethylhexylglycerin
  • Cetrimonium Chloride
  • Hydrolyzed Vegetable Protein PG-Propyl Silanetriol
  • Citronellol
  • Geraniol
  • Linalool
  • Alpha-Isomethyl Ionone
  • Viola Odorata Extract
  • Viola Odorata Flower / Leaf Extract
  • Sodium Hydroxide

Why This Product is Rated STOP

One United Leave-In Conditioner by REDKEN 5TH AVENUE NYC 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

One United Leave-In Conditioner by REDKEN 5TH AVENUE NYC - Non-toxic Hair Styling + Treatment product rated STOP by Million Marker, free from BPA, phthalates, and parabens

Please note that product images displayed on this page are obtained from third-party sources and provided for informational purposes only. Manufacturers and retailers may change product packaging, labeling, ingredients, or appearance without notice, so images may not reflect the most current version. Million Marker does not guarantee the accuracy of product images.