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

The Ordinary.

Multi-Peptide Serum for Hair Density

Last verified: April 10, 2026

  • Aqua (Water)
  • Propanediol
  • Butylene Glycol
  • Glycerin
  • Caffeine
  • Biotinoyl Tripeptide-1
  • Acetyl Tetrapeptide-3
  • Larix Europaea Wood Extract
  • Pisum Sativum Extract
  • Scutellaria Baicalensis Root Extract
  • Triticum Vulgare Germ Extract
  • Glycine Soja Germ Extract
  • Trifolium Pratense Flower Extract
  • Camellia Sinensis Leaf Extract
  • Apigenin
  • Oleanolic Acid
  • Arginine
  • Glycine
  • Calcium Gluconate
  • Zinc Chloride
  • Lactic Acid
  • Gluconolactone
  • Dextran
  • Maltodextrin
  • Hydroxyethylcellulose
  • Xanthan Gum
  • Pentylene Glycol
  • Dimethyl Isosorbide
  • Polysorbate 20
  • PPG-26-Buteth-26
  • PEG-40 Hydrogenated Castor Oil
  • Trisodium Ethylenediamine Disuccinate
  • Sodium Metabisulfite
  • Sodium Benzoate
  • Phenoxyethanol
  • Chlorphenesin

Why This Product is Rated STOP

Multi-Peptide Serum for Hair Density by The Ordinary. 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 →

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