Ammonium lactate 12%?

Ammonium lactate 12% is a topical medication (lotion/cream) used mainly for dry, rough, flaky skin and thickened/keratotic skin. The “12%” refers to the strength of ammonium lactate.

What it’s used for

Common uses include:

• Xerosis (very dry skin)
• Rough, scaly skin (ichthyosis, mild scaling disorders)
• Keratosis pilaris (“chicken skin” on arms/legs)
• Aging skin with rough texture
• Sometimes for thickened callus-like areas (as directed by a clinician)

How it works (simple)

Ammonium lactate is an alpha-hydroxy acid (AHA) + moisturizer. It helps:

• Loosen and exfoliate dead skin (gentler peeling)
• Improve hydration

How to use

Typically:

• Apply a thin layer to the affected area once or twice daily (follow your label/prescriber directions).
• Start once daily if you’re prone to irritation, then increase if tolerated.
• Avoid eyes, inside nose/mouth, and broken skin unless instructed.

Common side effects

• Mild burning/stinging
• Redness/irritation
• Dryness or peeling early on

Important precautions

• Avoid on open wounds or very irritated skin.
• If you’re using other exfoliating/irritating products (e.g., retinoids, benzoyl peroxide, strong AHAs/BHAs), you may get more irritation—consider spacing out and/or ask a pharmacist.
• If you develop significant swelling, severe burning, blistering, or rash, stop and seek advice.

If you tell me what you’re using it for (e.g., keratosis pilaris, eczema-like dryness, feet calluses) and where you’ll apply it, I can suggest a practical routine and what to expect.