Hyaluronic Acid 2% + B5 (Original Formulation)

The Ordinary

Hyaluronic Acid 2% + B5 (Original Formulation)

Hyaluronic Acid 2% + B5 (Original Formulation)

The Ordinary

hyaluronic-acid-2-b5-original-formulation

Serum

9784783995173

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

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Compatibility Score

0%

Microbiome
Ingredients
Biological
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Highlights

WHAT IS IT?

Hydrating serum with 4 types of hyaluronic acid

FEATURES

Contains 4 types of hyaluronic acid and pro-vitamin B5, Supports hydration to multiple layers of skin, Improves skin barrier function

BEST FOR

dry

CHECKS

Free from oils, alcohol, silicones

Who Is It For?

All Ages And Genders

What Does It Help With?

Dehydration Dryness Skin Barrier Support Smoothness

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 hydrating serum that combines 4 types of hyaluronic acid and pro-vitamin B5 to support hydration to multiple layers of the skin for a smooth appearance

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,Sodium-Hyaluronate,Pentylene-Glycol,Propanediol,Sodium-Hyaluronate-Crosspolymer,Panthenol,Ahnfeltia-Concinna-Extract,Glycerin,Trisodium-Ethylenediamine-Disuccinate,Citric-Acid,Isoceteth-20,Ethoxydiglycol,Ethylhexylglycerin,Hexylene-Glycol,1-2-Hexanediol,Phenoxyethanol,Caprylyl-Glycol

Key Ingredients

Hyaluronic Acid, Vitamin B5 (Panthenol), Sodium Hyaluronate Crosspolymer

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

Citric Acid

Common Name(s): Lemon acid,2-hydroxypropane-1,2,3-tricarboxylic acid

CAS Number: 77-92-9

DESCRIPTION

What It Does: Adjusts ph to optimal ranges, chelates destabilizing metal ions, provides mild exfoliation at higher concentrations.

Why It's Used: Universal cosmetic ph adjuster and chelating agent. aha exfoliant activity is secondary.

How It Works: As ph adjuster, donates protons. as chelating agent, three carboxylic groups bind divalent metals (caยฒโบ, mgยฒโบ, feยฒโบ) preventing oxidative degradation.

Typically Found In: Nearly all cosmetic formulations,brightening products,exfoliants

TECHNICAL DETAILS

Primary Category: Active ingredient โ€“ alpha hydroxy acid (aha)

Secondary Functions: Chelating agent,ph adjustment,preservation enhancement

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 โ€“ synthetic or fermentation-derived

Halal Status: Yes

Source Notes: Produced by fermentation of sugars by aspergillus niger. gras (e330). most abundant organic acid in citrus.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 โ€“ very low at low concentrations; 2/5 at exfoliant concentrations

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

Sensitivity Concerns: Photosensitizing โ€“ mandatory spf use. start at low frequency.

Safe for Sensitive Skin: Use with caution โ€“ spf required

SAFETY & COMPATIBILITY

Safety Profile: Safe at otc concentrations. eu: โ‰ค10% leave-on at ph โ‰ฅ3.5. mandatory spf advisory.

Works Well With: Niacinamide,ceramides,hyaluronic acid,spf

Avoid Combining With: Retinol in same step; multiple exfoliants simultaneously

SCIENTIFIC NOTE

Three carboxylic acid groups provide multiple proton donation sites and stronger chelation than monocarboxylic ahas. this makes citric acid the preferred cosmetic chelating agent alongside edta.

Last Verified: Cosing database,cir safety assessment,ewg skin deep

Primary Sources: 2026-03-12

Ethoxydiglycol

Common Name(s): Ethoxydiglycol,glycol co-solvent,humectant formulation aid

CAS Number: N/a

DESCRIPTION

What It Does: Provides co-solvent and penetration enhancer in cosmetic formulations, improving active ingredient dissolution and product texture while delivering mild skin conditioning.

Why It's Used: Glycol solvents are essential for dissolving actives with limited water or oil solubility โ€” the intermediate polarity of glycol ethers provides access to the wider solubility parameter space between pure water and oil phases.

How It Works: Hydroxyl and ether groups provide h-bonding for water miscibility; the organic chain provides compatibility with lipophilic actives. medium-chain glycols (c3โ€“c6) provide the optimal balance of water compatibility, lipophilic active dissolution, and skin-compatible humectancy.

Typically Found In: Skin care formulations,co-solvent systems

TECHNICAL DETAILS

Primary Category: Functional ingredient โ€“ humectant

Secondary Functions: Tewl reduction,skin plumping

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 1%โ€“30%

SOURCING & ETHICS

Vegan Status: Yes

Halal Status: Yes

Source Notes: Synthetic or naturally derived. excellent aqueous solubility.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 โ€“ very low

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

Sensitivity Concerns: Non-irritating; suitable for all skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

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

Works Well With: Ceramides,emollients,occlusives,glycerin,hyaluronic acid

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Glycol ether co-solvents enhance sc penetration of co-applied actives by increasing their thermodynamic activity in the sc lipid phase โ€” high thermodynamic activity (near saturation) drives diffusion by concentration gradient even when absolute concentration is low.

Last Verified: Cosing database,ethoxydiglycol glycol solvent review

Primary Sources: 2026-03-12

Glycerin

Common Name(s): Glycerol,glycerine,1,2,3-propanetriol

CAS Number: 56-81-5

DESCRIPTION

What It Does: Glycerin pulls water from the environment and deeper skin layers into the outer skin layer (epidermis), boosting moisture levels and keeping skin soft, smooth, and plump.

Why It's Used: It is used in virtually every moisturizer, serum, and cleanser because it is highly effective at hydrating skin, is well-tolerated by all skin types, and enhances the texture and spreadability of formulations.

How It Works: As a humectant, glycerin forms hydrogen bonds with water molecules, trapping them in the skin. it also reinforces the skin barrier by integrating into lipid structures between skin cells.

Typically Found In: Moisturizers,serums,cleansers,toners,sheet masks,sunscreens,body lotions,shampoos,conditioners

TECHNICAL DETAILS

Primary Category: Humectant

Secondary Functions: Skin barrier support,emollient,solvent

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 1%โ€“30% (typical: 3โ€“10%)

SOURCING & ETHICS

Vegan Status: Yes โ€“ plant-derived (coconut, soy, palm) or synthetic

Halal Status: Yes โ€“ when plant-derived or synthetic; verify source with supplier

Source Notes: Derived from plant oils via hydrolysis or saponification; synthetic versions also available. palm-derived glycerin carries sustainability concerns.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 โ€“ very low; non-irritating at all standard concentrations

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

Sensitivity Concerns: Extremely rare allergic reactions; generally safe for all skin types including sensitive and baby skin

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Widely recognized as safe. ewg hazard score: 1. no significant concerns for irritation, sensitization, or toxicity at typical concentrations (up to 50%).

Works Well With: Hyaluronic acid,ceramides,niacinamide,panthenol,urea,peptides,retinol,ahas/bhas

Avoid Combining With: No known incompatibilities at standard concentrations

SCIENTIFIC NOTE

Glycerin is an endogenous skin component found naturally in the stratum corneum. aquaporin-3 channels in keratinocytes facilitate glycerin transport, making it integral to natural skin hydration pathways.

Last Verified: Cosing database,cir safety assessment,ewg skin deep,inci decoder

Primary Sources: 2026-03-12