The Ordinary
Marine HyaluronicsThe Ordinary
Multi-Peptide + HA SerumA serum built around Lactic acid and BHA, for hydration and smoothing.
A serum built around Peptides and Hyaluronic acid, for hydration and smoothing.
Brand price
USD 8.28 · checked 25 Sept 2026 · brand's site
Brand price
USD 17.91 · checked 25 Sept 2026 · brand's site
At a Glance
Every check both products could be assessed on comes out the same. Tap any answer to see why.
Key Ingredients
Hyaluronic acid2
Hyaluronic acid and its salts; a humectant that binds water to the skin.
Benefits
Hydrating9
Boosts hydration and relieves dry, tight skin.
Algae Extract, Ethoxydiglycol, Glycerin, Histidine, PCA, Propanediol, Pseudoalteromonas Ferment Extract, Sodium Lactate, Sodium PCA
Barrier Repair3
Strengthens and restores the skin's natural barrier.
Smoothing5
Refines rough or uneven texture.
Algae Extract, Caprylyl Glycol, Citric Acid, Salicylic Acid, Sodium Lactate
Hydrating15
Boosts hydration and relieves dry, tight skin.
Acetyl Hexapeptide-8, Butylene Glycol, Ethoxydiglycol, Fructose, Glucose, Glycerin, Histidine, Maltose, PCA, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Sodium Lactate, Sodium PCA, Trehalose, Urea
Barrier Repair3
Strengthens and restores the skin's natural barrier.
Reduces Irritation2
Eases discomfort and supports skin resilience.
Concerns
May Worsen Seborrheic Dermatitis1
May feed the yeast involved in seborrheic dermatitis.
May Worsen Keratosis Pilaris1
May clog follicles or strip skin prone to keratosis pilaris.
May Worsen Seborrheic Dermatitis7
May feed the yeast involved in seborrheic dermatitis.
Acetyl Hexapeptide-8, Acetylarginyltryptophyl Diphenylglycine, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-1, Palmitoyl Tripeptide-38, PEG-40 Hydrogenated Castor Oil, Polysorbate 20
Ingredients Side-by-side
Emollient
Pseudoalteromonas Exopolysaccharides
Skin Conditioning
Skin Conditioning
Skin Conditioning
Humectant
- Fatty alcohols (Malassezia)
- Peptides
- Anti-Aging
- Firming
- Smoothing
- May Worsen Seborrheic Dermatitis
Skin Conditioning
- Fatty esters (glyceryl stearate, PEG-100 stearate)
- Peptides
- Anti-Aging
- Firming
- May Worsen Seborrheic Dermatitis
Skin Conditioning
- Fatty esters (glyceryl stearate, PEG-100 stearate)
- Peptides
- Anti-Aging
- Firming
- Reduces Irritation
- May Worsen Seborrheic Dermatitis
Skin Conditioning
- Fatty esters (glyceryl stearate, PEG-100 stearate)
- May Worsen Seborrheic Dermatitis
Dipeptide Diaminobutyroyl Benzylamide Diacetate
Skin Conditioning
Acetylarginyltryptophyl Diphenylglycine
Skin Conditioning
- Fatty alcohols (Malassezia)
- May Worsen Seborrheic Dermatitis
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Aqua
Solvent
Glycerin
Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care, Perfuming, Humectant, Skin Protecting, Solvent, Viscosity Controlling
Glycerin may be plant, synthetic or animal depending on the supplier.
Learn more about Glycerin →Arginine
Antistatic, Fragrance, Hair Conditioning, Skin Conditioning
L-Arginine
Learn more about Arginine →Glycine
Antistatic, Buffering, Hair Conditioning, Skin Conditioning
Glycine
Learn more about Glycine →Alanine
Antistatic, Fragrance, Hair Conditioning, Skin Conditioning
Alanine
Learn more about Alanine →Serine
Antistatic, Fragrance, Hair Conditioning, Skin Conditioning
2-Amino-3-hydroxypropanoic acid
Learn more about Serine →Valine
Antistatic, Fragrance, Hair Conditioning, Skin Conditioning
2-Amino-3-methylbutanoic acid
Learn more about Valine →Isoleucine
Antistatic, Hair Conditioning, Skin Conditioning
L-Isoleucine; DL-allo-Isoleucine; 2-Amino-3-methylpentanoic acid
Learn more about Isoleucine →Proline
Hair Conditioning, Skin Conditioning
2-Pyrrolidinecarboxylic acid, (S)-
Learn more about Proline →Threonine
Antistatic, Hair Conditioning, Hair Waving Or Straightening
2-Amino-3-hydroxybutanoic acid
Learn more about Threonine →
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