Ingredient review
Glycereth-5 Lactate
INCI: GLYCERETH-5 LACTATE
A mild, water-attracting ingredient that helps keep skin hydrated without clogging pores or causing irritation.
In plain English
Glycereth-5 Lactate is a modified form of glycerin (a common moisturizing ingredient) combined with lactic acid. It works by pulling water from the air into the outer layer of your skin, helping it stay soft and hydrated. Because it's gentle and non-greasy, it's a good choice for sensitive or acne-prone skin types.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Glycereth-5 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 Glycereth-5 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
Glycereth-5 Lactate is a semi-synthetic compound made by reacting glycerin with lactic acid. It belongs to a family of ingredients called humectants, which are substances that attract water. It is often used as a milder alternative to pure lactic acid or glycerin in skincare products.
How it works
When applied to the skin, Glycereth-5 Lactate forms a thin film that draws moisture from the environment and deeper layers of the skin to the surface. This helps maintain the skin's natural moisture barrier, reducing water loss and keeping the skin feeling smooth and supple.
Pros
Lightweight hydration
Unlike some heavier moisturizers, Glycereth-5 Lactate hydrates without leaving a greasy residue, making it ideal for daytime use or under makeup.
Low irritation potential
It is much milder than pure lactic acid and less likely to cause stinging or redness, even on compromised skin barriers.
Cons and cautions
Climate-dependent efficacy
In very dry environments, humectants like Glycereth-5 Lactate can sometimes draw moisture out of the skin if not paired with an occlusive ingredient.
Limited research
Compared to classic humectants like glycerin, there is less published research specifically on Glycereth-5 Lactate, so its long-term benefits are less documented.
Best for
- People with dry or dehydrated skin looking for a lightweight hydrator
- Those with sensitive or acne-prone skin who want a non-comedogenic moisturizing ingredient
Use caution if
- Individuals with a known allergy or sensitivity to glycerin derivatives or lactic acid
Usage tips
Safety summary
Glycereth-5 Lactate is considered safe for cosmetic use with a low risk of irritation or allergic reactions. It is non-comedogenic and suitable for most skin types, including sensitive skin.
Research notes
While direct studies on Glycereth-5 Lactate are limited, its components (glycerin and lactic acid) are well-researched and widely regarded as safe and effective humectants. The ingredient is accepted by cosmetic safety panels globally.
Common label clues
- Typical concentration
- 1% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most major markets. No known restrictions at typical use levels.
- Common uses
- Moisturizers, Cleansers, Serums, Toners
- Environmental note
- Glycereth-5 Lactate is derived from plant-based glycerin and lactic acid, making it a relatively sustainable choice compared to petroleum-based humectants.
Good to know
- Glycereth-5 Lactate is often listed near the middle or end of ingredient lists, indicating it is used at moderate concentrations.
- It is compatible with most other skincare ingredients, including vitamin C, retinol, and niacinamide.
Common questions
What is Glycereth-5 Lactate in beauty products?
Glycereth-5 Lactate is a modified form of glycerin (a common moisturizing ingredient) combined with lactic acid. It works by pulling water from the air into the outer layer of your skin, helping it stay soft and hydrated. Because it's gentle and non-greasy, it's a good choice for sensitive or acne-prone skin types.
What does Glycereth-5 Lactate do in a beauty product?
When applied to the skin, Glycereth-5 Lactate forms a thin film that draws moisture from the environment and deeper layers of the skin to the surface. This helps maintain the skin's natural moisture barrier, reducing water loss and keeping the skin feeling smooth and supple.
Is Glycereth-5 Lactate safe for most people?
Glycereth-5 Lactate is considered safe for cosmetic use with a low risk of irritation or allergic reactions. It is non-comedogenic and suitable for most skin types, including sensitive skin.
Who should be careful with Glycereth-5 Lactate?
Individuals with a known allergy or sensitivity to glycerin derivatives or lactic acid
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.