White cream in an open jar on a rock - Photo by Eveling Salazar on Unsplash

Lactic Acid for Sensitive Skin: The Gentlest Way Into AHAs

By Michael C. · Written and reviewed by Michael C.

AHA exfoliation · Published 2026-05-31 · 10 min read · 1813 words · Updated 2026-09-08

Lactic acid's larger molecular size makes it gentler than glycolic acid, and its natural humectant properties suit sensitive, dry or reactive skin.

Key takeaways

  • Lactic acid's larger molecular size means gentler, shallower penetration than glycolic acid.
  • It has a genuine humectant, hydrating property in addition to exfoliating, unusual among AHAs.
  • Typical concentrations for regular use range from 5 to 10 percent.
  • It is widely recommended as a starting point for people new to acids or with sensitive, reactive skin.

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Source: SkinLabs Editorial Team ()

Cover image: Eveling Salazar — credit