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Polyhydroxy Acids (PHA): Gluconolactone for Sensitive Skin

September 2, 2026
•By Clinical Dermatology & Formulation Board•5 min clinical read

Formulation & Clinical Summary

Second-generation hydroxy acids: why PHA's larger molecular structure delivers gentle chemical exfoliation, natural antioxidant defense, and humectant moisture.

Polyhydroxy Acids (PHAs) like Gluconolactone and Lactobionic Acid offer the skin-renewing power of AHAs without triggering stinging, photosensitivity, or erythema.

1. Why PHAs Outperform Glycolic for Reactive Skin

  • Molecular Dimension: Larger molecular radii slow epidermal penetration, preventing sudden nerve receptor firing and irritation.
  • Intrinsic Humectants: Multiple hydroxyl (-OH) groups attract atmospheric water, leaving skin plumper and more hydrated post-exfoliation.
  • Chelating Antioxidants: Scavenges free radicals and binds trace heavy metals to prevent environmental oxidative stress.
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Clinical Dermatology & Formulation Advisory Board

Our editorial board comprises licensed cosmetic chemists, clinical dermatologists, and botanical pharmacognosy researchers auditing active concentrations, molecular delivery systems, and stratum corneum biocompatibility.

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