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Voted NewBeauty's Favorite Serum for Sensitive Skin, 2026 — Shop now →

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Exfoliant

Lactic Acid

Also known as AHA, alpha hydroxy acid

A gentle alpha hydroxy acid that exfoliates and hydrates at the same time. Ideal for rough, dry body skin and bumpy texture.

What is lactic acid?

Lactic acid is an alpha hydroxy acid originally derived from milk. Its larger molecule works more gently than glycolic acid, and it's also a humectant, so it draws moisture into the skin while it exfoliates.

What it does for your skin

  • Smooths rough, bumpy texture
  • Softens dry, flaky patches
  • Leaves body skin looking brighter

How to use it

Apply a 10% lactic acid lotion to dry areas such as arms, legs, elbows and feet once a day. It's especially helpful for the small bumps of keratosis pilaris on the upper arms and thighs.

Who it's for

Anyone with dry, rough or bumpy body skin. It's a good choice for sensitive skin that finds other exfoliants too strong.

Common questions

Can lactic acid help keratosis pilaris?
Yes. Regular use of a lactic acid lotion helps smooth the look and feel of bumpy skin.
Can I use lactic acid lotion every day?
Yes, once your skin is used to it. Start every other day if you are sensitive.

This guide is general skincare information, not medical advice. If you're pregnant, nursing, using prescription skincare or have a skin condition, check with your doctor or our clinic team first.

Not sure what your skin needs?

Take our skin quiz for a routine matched to your skin, or book a free consult with our skin experts.