The Ordinary Marine Hyaluronics Versus The Ordinary Hyaluronic Acid 2% + B5 Serum
Updated on March 30, 2025
Overview
What they are
These products are both vegan, cruelty-free, and reef safe serums. They have a total of 9 ingredients in common
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin and scar healing
Free From
They both do not contain any harsh alcohols, common allergens, fragrances, oils, parabens, silicones or sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
The Ordinary Marine Hyaluronics 33 ingredients
The Ordinary Hyaluronic Acid 2% + B5 Serum 23 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
The Ordinary Marine Hyaluronics 33 ingredients
The Ordinary Hyaluronic Acid 2% + B5 Serum 23 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Algae Extract
Emollient
Pseudoalteromonas Exopolysaccharides
Skin ConditioningPseudoalteromonas Ferment Extract
Humectant
Ahnfeltia Concinna Extract
Skin ConditioningArginine
Masking
Glycine
Buffering
Alanine
MaskingSerine
Masking
Valine
MaskingIsoleucine
Skin ConditioningProline
Skin ConditioningThreonine
Histidine
Humectant
Phenylalanine
Masking
Aspartic Acid
Masking
PCA
Humectant
Sodium PCA
Humectant
Sodium Lactate
BufferingSalicylic Acid
Masking
Citric Acid
Buffering
Propanediol
Solvent
Dimethyl Isosorbide
SolventEthoxydiglycol
HumectantPolysorbate 20
Emulsifying
Potassium Sorbate
Preservative
Sodium Salicylate
Preservative
Sodium Benzoate
Masking
Hexylene Glycol
Emulsifying1,2-Hexanediol
Skin Conditioning
Phenoxyethanol
Preservative
Caprylyl Glycol
EmollientWater, 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
Water
Skin ConditioningSodium Hyaluronate
Humectant
Propanediol
Solvent
Pentylene Glycol
Skin ConditioningHydrolyzed Hyaluronic Acid
Humectant
Sodium Hyaluronate Crosspolymer
Humectant
Phospholipids
Skin Conditioning
Sphingolipids
EmollientPanthenol
Skin Conditioning
Ahnfeltiopsis Concinna Extract
Skin Conditioning
Glycerin
Humectant
Polysorbate 20
Emulsifying
Citric Acid
Buffering
Sodium Citrate
BufferingP-Anisic Acid
MaskingTocopherol
Antioxidant
Trisodium Ethylenediamine Disuccinate
Caprylyl Glycol
EmollientEthoxydiglycol
HumectantEthylhexylglycerin
Skin ConditioningHexylene Glycol
EmulsifyingPhenoxyethanol
Preservative
Chlorphenesin
Antimicrobial
Water, Sodium Hyaluronate, Propanediol, Pentylene Glycol, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate Crosspolymer, Phospholipids, Sphingolipids, Panthenol, Ahnfeltiopsis Concinna Extract, Glycerin, Polysorbate 20, Citric Acid, Sodium Citrate, P-Anisic Acid, Tocopherol, Trisodium Ethylenediamine Disuccinate, Caprylyl Glycol, Ethoxydiglycol, Ethylhexylglycerin, Hexylene Glycol, Phenoxyethanol, Chlorphenesin
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Caprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.
It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.
Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.
This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.
Learn more about Caprylyl GlycolCitric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and even out skin tone.
If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.
Read more about some other popular AHA's here:
Learn more about Citric AcidEthoxydiglycol is a synthetic solvent.
Solvents are used to keep ingredients together in a product. They can help dissolve ingredients to stable bases or help evenly distribute ingredients throughout the product.
Ethoxydiglycol also helps deliver other key ingredients into the skin.
Learn more about EthoxydiglycolGlycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinHexylene Glycol is a surfactant. Glycols are a class of alcohols. Hexylene Glycol is a surfactant and emulsifier.
As a surfactant, Hexylene Glycol helps gather dirt and oil on your skin to be washed away.
As an emulsifier, Hexylene Glycol helps keep water and oil together. This prevents them from separating in a product. Hexylene Glycol also thins out the texture of a product by lessening viscosity.
Hexylene Glycol has a small molecular weight.
Learn more about Hexylene GlycolPhenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
Polysorbate 20 is made by combining ethoxylation of sorbitan, ethylene oxide, and lauric acid. It is a mild cleansing agent, surfactant, and emulsifier.
As a surfactant, it helps collect dirt and oils for washing. Emulsifiers prevent oils and water from separating.
Polysorbate 20 also adds scent to a product. Since it is made using sorbitol, it has a sweet scent. Sorbitol can also be found in fruits such as apples and peaches.
The lauric acid used to create Polysorbate 20 is often derived from coconuts.
Polysorbate 20 may not be fungal acne safe.
Learn more about Polysorbate 20Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolWater. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterIngredient Ratings
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When to use
The Ordinary Marine Hyaluronics 33 ingredients
The Ordinary Hyaluronic Acid 2% + B5 Serum 23 ingredients
Reviews
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