12% ammonium lactate — the same active, at the same strength, that needs a prescription when it is called Lac-Hydrin.
Texture — Lotion
Key Active — Ammonium lactate 12%
Best For — Very dry, rough, bumpy skin; keratosis pilaris
Price Tier — $$
This is one of the genuinely effective body products in this whole category, and it works because it is an exfoliating acid, not just a moisturizer.
Ammonium lactate does two jobs at once. It is a humectant — it pulls water into skin. And it is an alpha hydroxy acid, so it loosens the bonds between dead skin cells and lets them shed.
For keratosis pilaris — the rough "chicken skin" bumps on arms and thighs — keratolytics like this are the mainstay of treatment. Not a cure, but the thing that actually works.
And here is the fact worth knowing: at 12%, this is the same active at the same strength as Lac-Hydrin — a prescription drug. You are buying it off a shelf.
Note the name change. AmLactin renamed this from "Daily Moisturizing Lotion" to "Daily Nourish Lotion 12%." Same product.
The prescription comparison cuts both ways, and this is the honest catch. Lac-Hydrin 12% is an FDA-approved drug, reviewed for safety and effectiveness. AmLactin sells the same molecule at the same strength as a cosmetic — no Drug Facts panel, no FDA efficacy review. Same active, two completely different regulatory worlds.
It makes you burn more easily — and the label says for longer than you think. The alpha hydroxy acid warning tells you to use sunscreen and protective clothing while using it "and for a week afterwards." Almost nobody reads that far.
It stings on broken skin, and AmLactin says so. Their own guidance is to avoid open or cracked skin — and their own FAQ says it "will not treat or cure" eczema, psoriasis or rosacea.
Keratosis pilaris comes back when you stop. This manages it. It does not cure it, and no one has anything that does.
The cosmetic safety panel's own guideline for AHAs is 10% or below. AmLactin sells 12% and 15%.
📋 2 key ingredients · body lotion
🧪 Lactic Acid / Ammonium Lactate (12%) — AHA; exfoliates gently and hydrates
💧 Glycerin (humectant) — additional hydration
ℹ️ The rare acid that moisturizes as it exfoliates — which is exactly what KP skin needs · ⚠️ Can sting on freshly shaved or broken skin
Ammonium lactate is lactic acid that has been partly neutralized with ammonium hydroxide.
That neutralization raises the pH, which makes it gentler and less stinging than straight lactic acid — but it also means a smaller proportion of the acid is in its free, active form.
It is a deliberate trade: less sting, slightly less punch. For a product you are meant to spread over your whole body every day, that is the right call.