Hyperpigmentation Risk Checker

Does Glycolic Acid Cause Hyperpigmentation?

Evidence-based guidance on glycolic acid and its risk of triggering or worsening dark spots, melasma, and post-inflammatory hyperpigmentation.

Risk level
MODERATE risk

Glycolic acid is a small-molecule AHA that exfoliates effectively but can irritate and increase photosensitivity. Overuse or incorrect timing can lead to post-inflammatory hyperpigmentation.

How it can affect pigmentation

  • Chemical exfoliation and barrier disruption
  • Photosensitization after use
  • Irritation leading to PIH, especially on darker skin tones

Usage advice

Glycolic acid is best used at night, at low frequency, and always followed by SPF the next day. Wash-off peels are lower risk than daily leave-on toners.

Recommendations

  • Introduce slowly (1-2 times per week).
  • Apply at night and use SPF every morning.
  • Avoid combining with retinoids on the same night when starting out.
  • Always use sun protection if your skin tends to hyperpigment; we recommend a zinc oxide sunscreen.

Sources

  • Alpha-hydroxy acids: therapeutic potentials. Tang SC, et al. Molecules. 2018;23(4):863. link

Related ingredients

Salicylic AcidMandelic AcidRetinol / Retinoids

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