Ingredient glossary
Lactobionic Acid
On your shelf ✓What Lactobionic Acid does for your skin, who it suits, and what to watch for.
INCI: Lactobionic Acid · Also: PHA
In short: Lactobionic Acid delivers exfoliation and hydration, suits most skin types, and the evidence behind it is moderate. One thing to know: clear it with your doctor if pregnant; needs the right pH to work.
- What it does
- Exfoliation, hydration
- Best for
- Most skin types
- Watch out
- Clear it with your doctor if pregnant; needs the right pH to work
- Evidence
- Moderate
- How long
- Never measured
The molecule
The Glow take
One of the ingredients I trust most.
When your goal is deep, lasting hydration, Lactobionic Acid delivers, with a solid amount of evidence behind it. It only performs at the right pH, so it is worth buying from brands that get the formulation details right.
— Maya
What it does
- exfoliation
- hydration
- barrier support
- antioxidant
moderate evidenceData indicate lactobionic acid is more hydrating and may offer stronger antioxidant and barrier benefits than gluconolactone, with very low irritation.
On a label: works best above 4%.
Who it's for, and who should skip it
Tends to suit
- dry
- sensitive
- all
Approach with care
No specific group flagged to avoid it.
- Clogs poresLow
- Irritation riskLow
- pH-dependentIts effect depends on the product's pH
How it fits each skin type
- DrySuits
- CombinationSuits
- OilySuits
- SensitiveSuits
Where it fits in your routine
Nobody has measured whether Lactobionic Acid changes how your skin handles sun.
Same position as gluconolactone: a polyhydroxy acid that exfoliates, but the AHA sunburn-alert data and recommendation cover glycolic and lactic acid only, and the countervailing PHA claim comes from developer-affiliated reviews, so no independent source settles it either way.
FDA AHA sunburn-alert guidance (scope and underlying data are AHAs, not PHAs); PHA non-photosensitivity claims from NeoStrata-affiliated review authors
Nobody has published how long this takes to work.
What is known, and what is missing
Measured on: stratum corneum smoothing from gentle exfoliation, with hydration as the secondary endpoint.
The same position as gluconolactone and thinner: a bionic acid used at 4-10% for gentle exfoliation and strong water-binding, supported by developer-affiliated comparative reviews rather than independent trials that report when anything changed. Nothing published dates either the exfoliation endpoint or the hydration endpoint this base scores 10. Its reputation for being more hydrating than gluconolactone is a comparison of extent, not of speed.
Developer-affiliated PHA reviews and comparative studies (described); no time-course trial located.
Plays well with
- humectants
- ceramides
- antioxidants
Lactobionic Acid, answered
Is Lactobionic Acid safe during pregnancy?
Clear it with your doctor first. Lactobionic Acid is flagged as use-with-caution during pregnancy and breastfeeding, so check with your doctor or midwife before adding it.
Who should avoid Lactobionic Acid?
No specific group is flagged to avoid Lactobionic Acid. It is well tolerated by most skin. Still, introduce anything new one product at a time.
What concentration of Lactobionic Acid actually works?
Research tends to show Lactobionic Acid starts pulling its weight above 4%. If a brand prints the percentage, that is the number to look for.
During pregnancy
Treat Lactobionic Acid as a maybe rather than a yes for now. It is flagged as one to use with caution while pregnant or breastfeeding, so it is worth clearing before you carry on.
When in doubt, check with your doctor or midwife. They outrank any website, including this one.When it is worth booking →
Compare Lactobionic Acid with
Can you mix Lactobionic Acid with
- Vitamin C (LAA)
- Retinol
- Salicylic acid (BHA)
- Lactic acid
- Glycolic acid
- Retinal
- Hydroxypinacolone Retinoate
- Retinyl Palmitate
- Retinyl Acetate
- Retinyl Propionate
- Retinyl Retinoate
- Tretinoin
- Adapalene
- Mandelic Acid
- Gluconolactone
- Phytic Acid
- Citric Acid
- GHK-Cu
- Willow Bark Extract
- Capryloyl Salicylic Acid
- Papain
- Bromelain
- Ammonium lactate
- Sponge spicules
- Betaine Salicylate
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