Bioderma Sébium Gel Moussant

Cleanser~€14typical, July 2026

Our read, in one look

Lactic acid is the reason to consider this cleanser, with Xylitol behind it.

The case for it

  • Lactic acid, moderate evidence for hydration
  • Xylitol, moderate evidence for hydration
  • No alcohol, silicones or parabens

Mind this

  • Sunscreen the next day, acids leave skin more sun-sensitive
  • Add it on its own for a week or two, so you know what your skin is answering to
Best for dry, normal, combo, dehydrated skinFind it on amazon.com
Maya's read

Bioderma Sébium Gel Moussant is a cleanser built around Lactic acid and Xylitol. It leans strongest on hydration. Best suited to dry, normal and combo skin. Go slow: the active is potent enough to irritate if overused.

Skip it if your barrier is already sensitised or compromised: the acids can sting broken or over-exfoliated skin.

The formula, drawn

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

4 of the 20 sit above the 1% line. The other 16, 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

What it delivers

Hydration7
Barrier repair4
Brightening / tone3
Oil-control & blemishes3
Anti-aging5

How it feels A gentle wash that lifts the day away without leaving skin tight or squeaky. (estimated from the formula)

What's in it that matters

The molecule doing the workLactic acidSupporting Active · moderate evidence

AHA that provides gentle exfoliation and some humectant effect; generally milder than glycolic but still pH-dependent and potentially irritating.

  • XylitolHumectantmoderate evidence

    Sugar alcohol humectant that can increase skin hydration and may support a healthy skin microbiome.

How to use it

In the evening, and not every night: 2–3 times a week is plenty. Follow with a moisturiser, and wear sunscreen the next day.

Keep it away from

  • Retinoids (retinol, tretinoin)
  • Benzoyl peroxide
  • Other exfoliating acids the same night
Not sure about two things on your shelf? Check them →

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.

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

Against the average cleanser

HydrationBarrier repairBrighteningOil-controlAnti-aging
This productMedian cleanser (7 in catalogue)

It scores lower than the median cleanser on barrier repair, hydration and oil control.

On brightening and anti-aging 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 11 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 20 ingredients, decoded
  1. Aqua/Water/EauSolvent (base)
  2. Sodium CocoamphoacetateCleansing agent
  3. mild irritant
  4. roughly the 1% lineThe rules only require descending order above 1%. From Disodium EDTA down, these 16 can be listed in any order the brand likes, so position stops telling you anything.
  5. MannitolHumectant (sugar)
  6. XylitolHumectant
  7. RhamnoseHumectant (sugar)
  8. Zinc SulfateMineral
  9. Copper SulfateMineral
  10. Ginkgo Biloba Leaf ExtractBotanical extract
  11. PEG-90 Glyceryl IsostearateEmulsifier
  12. Lactic AcidExfoliant
    mild irritant
  13. Laureth-2Emulsifier
  14. Potassium SorbatePreservative
  15. mild irritant
  16. Sodium HydroxidePh adjuster
    mild irritant
  17. can irritate

Worth knowing: Lactic acid, Xylitol sit below that line. They are in there, and the label does not tell you how much. That is not the same as saying it is too little to matter.

Copy the raw INCI list

Aqua/Water/Eau, Sodium Cocoamphoacetate, Sodium Laureth Sulfate, Methylpropanediol, Disodium EDTA, Mannitol, Xylitol, Rhamnose, Fructooligosaccharides, Zinc Sulfate, Copper Sulfate, Ginkgo Biloba Leaf Extract, PEG-90 Glyceryl Isostearate, Lactic Acid, Laureth-2, Potassium Sorbate, Sodium Chloride, Propylene Glycol, Sodium Hydroxide, Fragrance (Parfum)

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 6 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 Bioderma Sébium Gel Moussant good for dry skin?

By our read of the formula, it suits dry, normal, combo skin. Bioderma Sébium Gel Moussant is a cleanser built around Lactic acid and Xylitol. It leans strongest on hydration. Best suited to dry, normal and combo skin. Go slow: the active is potent enough to irritate if overused.

How do you use Bioderma Sébium Gel Moussant?

In the evening, and not every night: 2–3 times a week is plenty. Follow with a moisturiser, and wear sunscreen the next day.

What are the key ingredients in Bioderma Sébium Gel Moussant?

The actives that do the work are Lactic acid, Xylitol. The rest of the list is texture, preservatives and emulsifiers that hold the formula together.

What the 3D scene shows

The scene shows Bioderma Sébium Gel Moussant beside a cross-section of skin, with 2 of its ingredients drawn at the layer each one acts on and at one shared molecular scale: Lactic acid and Xylitol 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 ↻
Sébium Gel MoussantBioderma · Cleanser · ~€14

Lactic acid is the reason to consider this cleanser, with Xylitol behind it.

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