Marine Hyaluronics

The Ordinary

Marine Hyaluronics

Marine Hyaluronics

The Ordinary

marine-hyaluronics

Serum

9784784912677

Morning or Evening?

Morning
Evening
Both

How often will you use this product?

Everyday
Every other day
Every 3 days
Every 4 days
Every 5 days
Every 6 days
Once a week
Twice a week
On specific days
As needed
On rotation

Notes

Add to Routine
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Compatibility Score

0%

Microbiome
Ingredients
Biological
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Highlights

WHAT IS IT?

Ultra-lightweight hydration serum

FEATURES

Exceptionally lightweight serum, acts as a hyaluronic acid-alternative, directs water where needed most

BEST FOR

All skin types

CHECKS

No alcohol, oil-free

Who Is It For?

All Ages And Genders

What Does It Help With?

Dehydration Dryness

Budget

Affordable (under $30)

How To Use

Which routine should it be used in?

Morning
Evening
 
Cleanse
Tone
Eyecare
Serum
Moisturize
Suncare
 

Instructions:

Apply a few drops to the face in the morning and evening

Key Information

Vegan
Cruelty-free
Sensitive-safe
Non-comedogenic
Hypoallergenic
Microbiome-safe
Preservative-free
Eco-friendly
Pregnancy-safe
Oil-free

What The Ordinary Says

Product Description:

A serum with an intensely hydrating effect that combines exopolysaccharides from skin-friendly marine bacteria, Hawaiian red algae, glycoproteins from Antarctic marine sources, micro-filtered blue-green algae, and several amino acids. This water-based formula targets hydration below the skin surface, resulting in a softer, plumper complexion.

About the Brand:

Revolutionizing skincare transparency, The Ordinary offers clinical formulations with established technologies at radical price points. Founded by Brandon Truaxe under DECIEM in 2016, this disruptive brand focuses on single-ingredient integrity and scientific communication. Experience advanced actives without marketing hype or inflated costs through straightforward formulations that democratize effective skincare.

Ingredients Overview

Ingredients List

Aqua,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

Key Ingredients

Pseudoalteromonas Exopolysaccharides, Pseudoalteromonas Ferment Extract, Ahnfeltia Concinna Extract

Ingredients Details

Ahnfeltia Concinna Extract

Common Name(s): Ahnfeltia concinna extract,botanical extract,phytochemical active

CAS Number: N/a

DESCRIPTION

What It Does: Provides antioxidant protection, anti-inflammatory activity, and skin conditioning from polyphenols, terpenoids, and phytochemicals in the extract.

Why It's Used: Natural plant extracts provide multi-functional phytochemical profiles supporting concurrent skin care claims from one ingredient with authentic botanical heritage.

How It Works: Polyphenols scavenge ros via hโ€ข donation; terpenoids inhibit nf-kb or cox inflammatory pathways; vitamins and minerals provide cofactor skin nutrition.

Typically Found In: Botanical skin care,natural products

TECHNICAL DETAILS

Primary Category: Active ingredient โ€“ antioxidant

Secondary Functions: Free radical scavenging,anti-aging

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.1%โ€“30%

SOURCING & ETHICS

Vegan Status: Conditional

Halal Status: Conditional

Source Notes: Plant-derived extract or synthetic.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 โ€“ very low

Comedogenicity Rating: 0/5 โ€“ non-comedogenic

Sensitivity Concerns: Non-irritating; well-tolerated.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. ewg score: 1.

Works Well With: Vitamin c,vitamin e,ferulic acid,spf,other antioxidants

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Plant secondary metabolites evolved for uv photoprotection and pathogen defence โ€” mechanisms directly applicable to cosmetic antioxidant and anti-inflammatory activity in human skin.

Last Verified: Cosing database,ahnfeltia concinna extract botanical review

Primary Sources: 2026-03-12

Alanine

Common Name(s): L-alanine,2-aminopropanoic acid

CAS Number: 56-41-7

DESCRIPTION

What It Does: Provides nmf-type humectant moisture retention and skin conditioning.

Why It's Used: Simple, well-tolerated nmf amino acid humectant for skin conditioning formulations.

How It Works: Small methyl side chain contributes to protein hydrophobic core but as free amino acid provides direct humectant activity via amino and carboxyl groups. converted to pyruvate for cellular atp production via gluconeogenesis.

Typically Found In: Nmf moisturizers,skin conditioning products

TECHNICAL DETAILS

Primary Category: Active ingredient โ€“ amino acid

Secondary Functions: Nmf component,cellular energy

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.5%โ€“5%

SOURCING & ETHICS

Vegan Status: Yes โ€“ plant-derived or synthetic

Halal Status: Yes

Source Notes: Fermentation-derived or synthetic. natural skin component.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 โ€“ very low

Comedogenicity Rating: 0/5 โ€“ non-comedogenic

Sensitivity Concerns: Non-irritating; endogenous skin molecule.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. natural skin nmf component. ewg score: 1.

Works Well With: Hyaluronic acid,ceramides,peptides,other amino acids

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Free alanine is among the most abundant amino acids in the stratum corneum nmf, where it contributes to the aqueous phase hydration that keeps the stratum corneum flexible and functional.

Last Verified: Cosing database,cir safety assessment

Primary Sources: 2026-03-12

Algae Extract

Common Name(s): Algae extract,botanical extract,phytochemical active

CAS Number: N/a

DESCRIPTION

What It Does: Provides antioxidant protection from reactive oxygen species, reduces inflammatory cytokine production in skin, and conditions skin surface through the plant's secondary metabolite complex.

Why It's Used: Chosen for its natural origin narrative, traditional use heritage, and multi-functional phytochemical profile that supports several concurrent skin care claims from one ingredient.

How It Works: Polyphenols, terpenoids, and alkaloids in the extract scavenge ros via hydrogen atom transfer, inhibit nf-kb or cox-2 inflammatory pathways, and interact with skin surface proteins for conditioning.

Typically Found In: Botanical skin care,natural products

TECHNICAL DETAILS

Primary Category: Active ingredient โ€“ antioxidant

Secondary Functions: Free radical scavenging,anti-aging

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.1%โ€“10%

SOURCING & ETHICS

Vegan Status: Yes

Halal Status: Yes

Source Notes: Plant-derived extract or synthetic.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 โ€“ very low

Comedogenicity Rating: 0/5 โ€“ non-comedogenic

Sensitivity Concerns: Non-irritating; well-tolerated.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. ewg score: 1.

Works Well With: Vitamin c,vitamin e,ferulic acid,spf,other antioxidants

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Plant secondary metabolites evolved as uv photoprotectants and antimicrobial agents โ€” mechanisms that directly translate to cosmetic antioxidant and anti-inflammatory activity in human skin.

Last Verified: Cosing database,algae extract botanical review

Primary Sources: 2026-03-12

Arginine

Common Name(s): L-arginine,2-amino-5-guanidinopentanoic acid

CAS Number: 74-79-3

DESCRIPTION

What It Does: Conditions skin, attracts moisture, supports wound healing, and improves microcirculation via no synthesis.

Why It's Used: Multi-functional amino acid for skin hydration, conditioning, and wound healing in peptide and nmf formulations.

How It Works: Guanidinium group binds water (humectant). substrate for nitric oxide synthase (enos) producing nitric oxide that vasodilates capillaries improving skin nutrition. stimulates fibroblast proliferation for wound healing.

Typically Found In: Anti-aging serums,wound healing products,nmf moisturizers,scalp treatments

TECHNICAL DETAILS

Primary Category: Active ingredient โ€“ amino acid

Secondary Functions: Wound healing,microcirculation,nmf component

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.5%โ€“5%

SOURCING & ETHICS

Vegan Status: Yes โ€“ plant-derived or synthetic

Halal Status: Yes

Source Notes: Fermentation-derived or synthetic. natural skin component.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 โ€“ very low

Comedogenicity Rating: 0/5 โ€“ non-comedogenic

Sensitivity Concerns: Non-irritating; endogenous skin molecule.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. natural skin nmf component. ewg score: 1.

Works Well With: Hyaluronic acid,ceramides,peptides,other amino acids

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Arginine is a conditionally essential amino acid in wound healing where local demand exceeds synthesis capacity. topical arginine provides the nos substrate locally for no-mediated vasodilation and immune cell function in healing tissue.

Last Verified: Cosing database,cir safety assessment,witte & barbul arginine wound healing review

Primary Sources: 2026-03-12