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Pantolactone

Well toleratedOtherskin conditioningpreservative booster

No meaningful concern for most people; irritation is possible but rare.

Also written as: D-Pantolactone · Dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone

What it is

Pantolactone is the lactone form of pantoic acid and a chemical relative of panthenol (provitamin B5). In cosmetics it is used at low levels as a skin-conditioning agent and as a mild antimicrobial booster, particularly in Korean and Japanese formulas. It is not an EU-listed preservative and has no specific restriction.

What it does well

  • Adds light conditioning while supporting preservation

    Used mainly as a formulation aid; independent clinical evidence for skin benefits in finished products is thin.

    Limited evidence

Worth knowing

  • Very little published human data

    There are no meaningful reports of irritation or allergy, but there is also very little independent testing to draw on.

    Matters most toPeople who prefer well-documented ingredients.

Where the EU stands

No specific restriction

Not listed in Annex V and not otherwise restricted in EU cosmetics.

Masks that contain Pantolactone