Marine Hyaluronics

Marine Hyaluronics Texture Gif
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alex markel
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Marine Hyaluronics brings together lightweight marine-derived water reservoirs that attract and hold water like hyaluronic acid (HA) but are lighter than HA in texture and feel.  The formula contains exopolysaccharides from skin-friendly marine bacteria, Hawaiian red algae, Glycoproteins from Antarctic marine sources, micro-filtered blue-green algae and several health-supporting amino acids.
All marine derivatives in Marine Hyaluronics are sourced sustainably. The total concentration of active ingredients in this formula is 23%.
The Ordinary


marine hyaluronics overview

this product is water-free, fragrance-free, cruelty-free, and vegan.
$6.80 1 fl oz/30 ml $6.80/oz EWG Skindeep Database - 3 4–5
Aqua |
Glycerin |
Algae Extract |
Pseudoalteromonas Exopolysaccharides |
Pseudoalteromonas Ferment Extract |
Ahnfeltia Concinna (Algae) Extract |
skin protectant
Arginine |
skin conditioning agent
Glycine |
skin conditioning agent
Alanine |
skin conditioning agent
Serine |
skin conditioning agent
Valine |
skin conditioning agent
Isoleucine |
skin conditioning agent
Proline |
skin conditioning agent
Threonine |
skin conditioning agent
Histidine |
skin conditioning agent
Phenylalanine |
skin conditioning agent
Aspartic Acid |
skin conditioning agent
Sodium PCA |
Sodium Lactate |
Salicylic Acid |
antiacne agent/skin conditioning agent
Citric Acid  |
pH adjuster
Propanediol |
viscosity decreasing agent
Dimethyl Isosorbide |
viscosity decreasing agent
Ethoxydiglycol |
viscosity decreasing agent
Polysorbate 20 |
Potassium Sorbate |
Sodium Salicylate |
Sodium Benzoate |
Hexylene Glycol |
skin conditioning agent
1,2-Hexanediol |
skin conditioning agent
Phenoxyethanol |
Caprylyl Glycol |
skin conditioning agent


(Ingredients of Low Concern) (Ingredients of Moderate Concern)–Color coding according to EWG

Independent Assessment

All of the ingredients used in this formulation are safe at current use and concentrations.

PCA and Sodium PCA are only of any concern when formulated with nitrosating agents (none are present). Some common ones are:

    • 3-diol
    • Ammonium Laureth (or Lauryl) Sulfate
    • DEA (Diethanolamine), MEA (Monoethanolamine), and TEA (Triethanolamine)
    • Formaldehyde (All Aldehydes)
    • Hydrolyzed Animal Protein
    • Imidazolidinyl Urea
    • Sodium Lauryl (or Laureth) Sulfate
    • Quaternium-7, 15, 31, 60, etc

Phenoxyethanol should be used at ≤ 1% concentration. It has data gaps but the biggest concern is whether or not it is used in a preservative system with methyldibromo glutaronitrile (which seems to be the allergen in the system). However, that is not listed here so we can only assume it was not used.

Salicylic Acid is safe and will not greatly increase skin absorption unless formulated with the following ingredients:

  • vitamin A
  • ammoniated mercury
  • triamcinolone acetonide

The glycols used in this formulation are not petroleum-derived. So… bonus for that one.

Marine Hyaluronics Review

As far as pure hyaluronic acids (or hyaluronic-type serums) go, the Marine Hyaluronics from The Ordinary has been my favorite as far as texture and overall product experience.

Now, this may not be for everyone. If you want a product that masks the natural (and sometimes not entirely pleasant) smell of the product, this one isn’t for you. On that note, I love that this is fragrance-free. I don’t mind the natural smell of the product. It is a bit nutty and smells a little of algae (the source of the HA). If you’ve ever had a cheesy rice puff snack called Pirates Booty, that’s what this product smells like.

Now to the good stuff; texture and consistency. The texture is very light and the consistency is very thin and “watery”.  It’s not nearly as thick as a more “traditional” hyaluronic acid (HA). The Ordinary even states that if you prefer a thicker or “viscous” consistency to go with their HA 2% + B5.

I personally have really enjoyed the application experience of this product. It absorbs quickly. At first use, it is a bit alarming because the product has a bit of a tightening effect on the skin. I’ve found that it works (and feels) best if you pat in roughly 8 drops while your toner is still damp and immediately follow with your water-based serum(s).

Another added bonus, because the hyaluronic acid comes from plants, there is no concern that the HA was sourced from rooster comb! I think Marine Hyaluronics has gained the title of my favorite product from Deciem overall, not just from their brand The Ordinary.


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