The Ordinary Hyaluronic Acid 2% + B5 (Original Formulation)

Serum~€8typical, July 2026

Our read, in one look

Hyaluronic acid is the reason to consider this serum, with Pro-vitamin B5 behind it.

The case for it

  • Hyaluronic acid, strong evidence for hydration
  • Pro-vitamin B5, strong evidence for the barrier
  • No fragrance, alcohol, silicones or parabens

Mind this

  • Morning or evening, whichever suits your routine
  • Add it on its own for a week or two, so you know what your skin is answering to
Best for dry, dehydrated, very dry, compromised barrier skinFind it on amazon.com
Maya's read

The Ordinary Hyaluronic Acid 2% + B5 (Original Formulation) is a serum built around Glycerin, Hyaluronic acid and Crosslinked sodium HA. It leans strongest on hydration, barrier repair. Best suited to dry, dehydrated and very dry skin. Nothing in it we'd flag for most people.

Skip it if you already own something similar: it's a solid, honest basic rather than a must-have upgrade.

The formula, drawn

Every ingredient in label order, coloured by the job it does here.

12 of the 17 sit above the 1% line. The other 5, hatched, are each under 1%. Widths show the ORDER on the label and nothing else: the label never discloses amounts, so we never draw them.

  • Actives & signals
  • Hydrators
  • Texture & base
  • Preservation
  • Not in our library yet
  • No fragrance anywhere on the label

What it delivers

Hydration10
Barrier repair8
Brightening / tone3
Oil-control & blemishes3
Anti-aging2

How it feels A light, fast-absorbing texture that layers cleanly under the rest of your routine, with no greasy film. (estimated from the formula)

What's in it that matters

The molecule doing the workGlycerinHumectant · strong evidence

Classic humectant with strong evidence for improving skin hydration and supporting barrier when combined with emollients.

  • Hyaluronic acidHumectantstrong evidence

    Water-binding molecule that increases hydration; works best under occlusive/emollient layers to reduce evaporation.

  • Crosslinked sodium HAHumectantstrong evidence

    Crosslinked sodium hyaluronate that forms a hydrated gel matrix at the surface. Used in serums for longer lasting hydration that visibly softens fine lines while it is in place.

  • Pro-vitamin B5Supporting Activestrong evidence

    Humectant and soothing ingredient that helps calm irritation and supports barrier repair and recovery.

  • Pentylene GlycolHumectantmoderate evidence

    Short chain diol that works as a light humectant, co solvent and preservative booster. It keeps a formula less sticky and microbially stable while hydrating the outer layers.

How to use it

Morning and/or night, after your thinner water-based steps and before heavier creams.

Where it acts

The same cross-section as our 500 dalton page, with this formula's actives on the layer each one works on. Depth is the anatomy's, never an ingredient's.

5 of this product's actives have a layer we can defend.

Against the average serum

HydrationBarrier repairBrighteningOil-controlAnti-aging
This productMedian serum (27 in catalogue)

It scores lower than the median serum on anti-aging and brightening.

On hydration, barrier repair and oil control it is level with the median, so that is not what sets it apart.

A median, not an average: one unusual formula should not move the middle. The numbers are the same 0 to 10 reads the comparison pages use.

The full ingredients list, decoded

Every ingredient on the label, in the order it appears (highest amount first). We link the 15 our library knows, name what each one does, and flag anything that can irritate or clog. The rest we leave plain, nothing is hidden.

All 17 ingredients, decoded
  1. Aqua (Water)Solvent (base)
  2. PropanediolHumectant
  3. PanthenolHumectant
  4. Ahnfeltia Concinna ExtractBotanical extract
  5. GlycerinHumectant
  6. Citric AcidExfoliant
    mild irritant
  7. Isoceteth-20Emulsifier
  8. roughly the 1% lineThe rules only require descending order above 1%. From Ethylhexylglycerin down, these 5 can be listed in any order the brand likes, so position stops telling you anything.
  9. EthylhexylglycerinPreservative booster
  10. mild irritant
  11. 1,2-HexanediolPreservative booster
  12. PhenoxyethanolPreservative
    mild irritant
  13. Caprylyl GlycolPreservative booster
Copy the raw INCI list

Aqua (Water), 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

Read enough? Find it on amazon.com

We don't make or sell skincare of our own. So there's nothing here we're trying to push, just an honest read of whether this formula suits your skin.

Compare it with…

All 23 comparisons

Decode your product

Photograph the front and the ingredients list on the back. We check every product against the same knowledge base by hand, so this takes days, not seconds.

The photos

Common questions

Is The Ordinary Hyaluronic Acid 2% + B5 (Original Formulation) good for dry skin?

By our read of the formula, it suits dry, dehydrated, very dry skin. The Ordinary Hyaluronic Acid 2% + B5 (Original Formulation) is a serum built around Glycerin, Hyaluronic acid and Crosslinked sodium HA. It leans strongest on hydration, barrier repair. Best suited to dry, dehydrated and very dry skin. Nothing in it we'd flag for most people.

How do you use The Ordinary Hyaluronic Acid 2% + B5 (Original Formulation)?

Morning and/or night, after your thinner water-based steps and before heavier creams.

What are the key ingredients in The Ordinary Hyaluronic Acid 2% + B5 (Original Formulation)?

The actives that do the work are Glycerin, Hyaluronic acid, Crosslinked sodium HA, Pro-vitamin B5, Pentylene Glycol. The rest of the list is texture, preservatives and emulsifiers that hold the formula together.

Does The Ordinary Hyaluronic Acid 2% + B5 (Original Formulation) contain fragrance?

No. By our reading of the ingredient list it is fragrance-free, which is a plus for sensitive or reactive skin.

What the 3D scene shows

The scene shows The Ordinary Hyaluronic Acid 2% + B5 (Original Formulation) beside a cross-section of skin, with 3 of its ingredients drawn at the layer each one acts on and at one shared molecular scale: Glycerin and Pentylene Glycol and Pro-vitamin B5 in the stratum corneum, the dead outer layer where most skincare works. Depths come from the same sourced layer data as the rest of this site, and any ingredient whose layer is not established is left out rather than guessed.

Building the scene…

This is skin, in section.

The molecules floating inside it are from this bottle, each at the layer it works on, drawn to one true scale. Drag to turn, pinch or scroll to zoom, tap a molecule for its evidence.

Skin in section· molecules from this formula · one true scale
tap it to decode ↻
Hyaluronic Acid 2% + B5 (Original Formulation)The Ordinary · Serum · ~€8

Hyaluronic acid is the reason to consider this serum, with Pro-vitamin B5 behind it.

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