Ingredient review
Ammonium Lactate
INCI: Ammonium Lactate
Ammonium lactate is a milder, less acidic alternative to straight lactic acid that hydrates and gently exfoliates, making it suitable for dry or sensitive skin.
In plain English
Ammonium lactate is a salt form of lactic acid, an alpha hydroxy acid (AHA) that naturally occurs in milk. By neutralizing lactic acid with ammonia, it becomes less acidic and less likely to sting or irritate. In skincare, it works as both a humectant (draws moisture into the skin) and a gentle exfoliant (loosens dead skin cells). It's often found in moisturizers for dry, rough, or flaky skin, especially on the body. Because it's milder, it's a good choice for people who find regular AHAs too harsh.
Quick decision guide
Useful, but context matters
Ammonium Lactate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Ammonium Lactate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A salt formed by reacting lactic acid (an AHA) with ammonium hydroxide. It appears as a clear to slightly yellow liquid and is water-soluble.
How it works
As a humectant, it attracts water from the air and deeper skin layers to the outer skin. As an exfoliant, it breaks down the bonds between dead skin cells, helping them shed more easily. This dual action smooths rough texture and improves skin hydration.
Pros
Gentle exfoliation
Ammonium lactate exfoliates dead skin cells more mildly than pure lactic acid, reducing the risk of stinging or redness for sensitive skin.
Dual hydration
It both attracts moisture (humectant) and helps the skin retain it, making it effective for dry, dehydrated skin on the face and body.
Cons and cautions
Milder exfoliation
Because it's neutralized, it exfoliates less aggressively than lactic acid, so it may not deliver dramatic results for those seeking strong anti-aging effects.
Potential tingling
Even though it's milder, some people with very reactive skin may still experience a slight tingling sensation upon application.
Best for
- People with dry, rough, or flaky skin
- Those with sensitive skin who want gentle exfoliation
- Individuals looking for a hydrating body lotion ingredient
Use caution if
- Those with known allergy to ammonium compounds
- People with open wounds or active eczema on application area
Usage tips
Safety summary
Ammonium lactate is considered safe for cosmetic use at typical concentrations. It is less irritating than lactic acid, but patch testing is recommended for very sensitive skin. Avoid contact with eyes and broken skin.
Research notes
Clinical studies show ammonium lactate improves skin hydration and reduces scaling in dry skin conditions. Evidence for anti-aging benefits is less robust than for pure AHAs, but it is well-tolerated for long-term use.
Common label clues
- Typical concentration
- 1% to 12% in leave-on products; higher concentrations in professional peels
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and many other regions. In the US, it is also used in OTC drug products for dry skin at concentrations up to 12%.
- Common uses
- Moisturizers, Body lotions, Hand creams, Anti-aging creams
- Environmental note
- Ammonium lactate is biodegradable and generally considered low-risk for aquatic environments when used in rinse-off products.
Good to know
- Ammonium lactate is often used in prescription creams for dry skin conditions like ichthyosis vulgaris.
- It has a higher pH (around 4.5–5.5) compared to pure lactic acid, making it less likely to disrupt the skin barrier.
Common questions
What is Ammonium Lactate in beauty products?
Ammonium lactate is a salt form of lactic acid, an alpha hydroxy acid (AHA) that naturally occurs in milk. By neutralizing lactic acid with ammonia, it becomes less acidic and less likely to sting or irritate. In skincare, it works as both a humectant (draws moisture into the skin) and a gentle exfoliant (loosens dead skin cells). It's often found in moisturizers for dry, rough, or flaky skin, especially on the body. Because it's milder, it's a good choice for people who find regular AHAs too harsh.
What does Ammonium Lactate do in a beauty product?
As a humectant, it attracts water from the air and deeper skin layers to the outer skin. As an exfoliant, it breaks down the bonds between dead skin cells, helping them shed more easily. This dual action smooths rough texture and improves skin hydration.
Is Ammonium Lactate safe for most people?
Ammonium lactate is considered safe for cosmetic use at typical concentrations. It is less irritating than lactic acid, but patch testing is recommended for very sensitive skin. Avoid contact with eyes and broken skin.
Who should be careful with Ammonium Lactate?
Those with known allergy to ammonium compounds People with open wounds or active eczema on application area
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.