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The Ordinary Marine Hyaluronic Moisture Lock Serum #1
The Ordinary Marine Hyaluronic Moisture Lock Serum #1

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The OrdinaryMarine Hyaluronic Moisture Lock Serum

Item 2552297

4.5 out of 5 stars. 534 reviewsQ & A
Size:1.0 oz


The Ordinary's Marine Hyaluronic Moisture Lock Serum is an ultra-lightweight hydration support with marine-derived water reservoirs that attract and hold water like hyaluronic acid (HA), but are lighter than HA in texture and feel.



  • Attracts and holds water within skin
  • Provides hydration support
  • Replenishes lost water
  • PH 4.75 - 5.25

Key Ingredients

  • Amino Acids
  • Exopolysaccharides from skin-friendly marine bacteria
  • Hawaiian red algae
  • Gycoproteins from Antarctic marine sources
  • Micro-filtered blue-green algae

Formulated Without

  • Fragrance
  • Alcohol
  • Oil
  • Silicone
  • Nuts
  • Gluten
  • Parabens
  • Sulfates
  • Mineral Oil
  • Methylchloroisothiazolinone
  • Methylisothiazolinone
  • Animal Oils
  • Coal Tar Dyes
  • Formaldehyde
  • Mercury
  • Oxybenzone

How To Use

The Ordinary recommends performing a patch test prior to incorporating a new product into your skin care routine.

Apply a few drops to face AM and PM before creams.


Aqua (water), Glycerin, Algae Extract, Pseudoalteromonas Exopolysaccharides, Pseudoalteromonas Ferment Extract, Ahnfeltia Concinna Extract, Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Aspartic Acid, Pca, Sodium Pca, Sodium Lactate, Salicylic Acid, Citric Acid, Propanediol, Dimethyl Isosorbide, Ethoxydiglycol, Polysorbate 20, Potassium Sorbate, Sodium Salicylate, Sodium Benzoate, Hexylene Glycol, 1,2-hexanediol, Phenoxyethanol, Caprylyl Glycol.