Ingredient review

PPG-24 Glycereth-24

INCI: PPG-24-GLYCERETH-24

A gentle, synthetic humectant that helps your skin hold onto moisture without feeling sticky or greasy.

beautyskincarehumectant

In plain English

PPG-24 Glycereth-24 is a lab-made ingredient that acts like a moisture magnet. It pulls water into the outer layer of your skin and helps keep it there, so your skin feels softer and more hydrated. It's often used in moisturizers and serums because it's very gentle and doesn't clog pores or cause irritation for most people.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

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
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

PPG-24 Glycereth-24 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging PPG-24 Glycereth-24.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

PPG-24 Glycereth-24 is a synthetic polymer made by combining propylene glycol and glycerin. It belongs to a family of ingredients called PPG (polypropylene glycol) ethers, which are known for their ability to attract and hold water.

How it works

It works as a humectant, meaning it draws moisture from the air or deeper layers of your skin to the surface. It also forms a thin, non-greasy film that helps reduce water loss, keeping your skin hydrated for longer.

Pros

Excellent hydration

Helps your skin hold onto moisture, reducing dryness and flakiness without a heavy feel.

Very gentle

Rated low for both irritation and comedogenicity, making it suitable for sensitive and acne-prone skin.

Cons and cautions

Synthetic origin

Some people prefer naturally derived humectants like glycerin or aloe, as PPG-24 Glycereth-24 is lab-made.

Limited research

There is less published research on this specific ingredient compared to more common humectants like hyaluronic acid.

Best for

  • People with dry or dehydrated skin
  • Those looking for a lightweight, non-comedogenic humectant

Use caution if

  • Individuals with known sensitivity to propylene glycol derivatives

Usage tips

Apply to damp skin to maximize moisture absorption.
Layer under a heavier moisturizer or occlusive if you have very dry skin.
Use in combination with other humectants for a multi-layered hydration boost.

Safety summary

PPG-24 Glycereth-24 is considered safe for topical use in cosmetics. It has a low potential for skin irritation and is non-comedogenic. As with any ingredient, patch testing is recommended for those with very sensitive skin.

Research notes

While not as extensively studied as glycerin, PPG ethers have been reviewed by the Cosmetic Ingredient Review panel and found safe for use. Most evidence comes from formulation science rather than large-scale clinical trials.

Common label clues

Typical concentration
Typically 0.5% to 5% in leave-on products
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has deemed PPG ethers safe as used in cosmetics.
Common uses
Moisturizers, Serums, Cleansers, Sunscreens
Environmental note
As a synthetic polymer, it is not biodegradable and may accumulate in the environment. However, it is used in low concentrations.

Good to know

  • PPG-24 Glycereth-24 is often used in 'water drop' or gel-cream textures because it helps create a lightweight, refreshing feel.
  • It is considered safe by major cosmetic ingredient review panels at typical use levels.

Common questions

What is PPG-24 Glycereth-24 in beauty products?

PPG-24 Glycereth-24 is a lab-made ingredient that acts like a moisture magnet. It pulls water into the outer layer of your skin and helps keep it there, so your skin feels softer and more hydrated. It's often used in moisturizers and serums because it's very gentle and doesn't clog pores or cause irritation for most people.

What does PPG-24 Glycereth-24 do in a beauty product?

It works as a humectant, meaning it draws moisture from the air or deeper layers of your skin to the surface. It also forms a thin, non-greasy film that helps reduce water loss, keeping your skin hydrated for longer.

Is PPG-24 Glycereth-24 safe for most people?

PPG-24 Glycereth-24 is considered safe for topical use in cosmetics. It has a low potential for skin irritation and is non-comedogenic. As with any ingredient, patch testing is recommended for those with very sensitive skin.

Who should be careful with PPG-24 Glycereth-24?

Individuals with known sensitivity to propylene glycol derivatives

Research sources

Cosmetic Ingredient Review – Safety Assessment of PPG EthersOpenPubChem – PPG-24 Glycereth-24OpenINCI Decoder – PPG-24 Glycereth-24Open

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.