Ingredient review

PEG-160M

INCI: PEG-160M

PEG-160M is a safe, synthetic thickener that improves product texture without causing irritation or clogging pores.

beautyskincarethickener

In plain English

PEG-160M is a type of polyethylene glycol (PEG) with a very large molecule size. In skincare, it acts as a thickener and binder, helping to give creams and lotions a smooth, rich texture. Because its molecules are too large to absorb into the skin, it stays on the surface and is generally considered non-irritating and non-comedogenic (won't clog pores). It's a common ingredient in many cosmetic formulations for its ability to improve consistency and stability.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 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

PEG-160M 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 PEG-160M.
  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

PEG-160M is a synthetic polymer made from ethylene oxide, with a molecular weight of about 160,000 Daltons. It belongs to the PEG family, which are widely used in cosmetics as thickeners, solvents, and emulsifiers.

How it works

In a cosmetic product, PEG-160M dissolves in water and forms a gel-like network that increases the viscosity of the formula. This gives the product a thicker, more luxurious feel and helps suspend other ingredients evenly. It also acts as a binder, helping to hold the formula together and improve its stability over time.

Pros

Excellent thickener

Provides a smooth, creamy texture to lotions and creams without greasiness.

Low irritation potential

Large molecular size means it stays on the skin surface, making it gentle even for sensitive skin.

Cons and cautions

Synthetic origin

Derived from petroleum, which may be a concern for those seeking natural or eco-friendly products.

Manufacturing impurities

If not properly purified, PEGs can contain trace amounts of ethylene oxide or 1,4-dioxane, though cosmetic-grade PEG-160M is typically purified to safe levels.

Best for

  • Anyone looking for a well-textured cream or lotion
  • People with sensitive or acne-prone skin who need non-comedogenic thickeners

Use caution if

  • Those who strictly avoid synthetic ingredients
  • Individuals with known allergies to PEG compounds (rare)

Usage tips

Look for products that list PEG-160M near the end of the ingredient list, indicating a low concentration.
If you prefer natural alternatives, look for thickeners like xanthan gum or carrageenan instead.

Safety summary

PEG-160M is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. The main safety concern is potential contamination with ethylene oxide or 1,4-dioxane during manufacturing, but cosmetic-grade PEGs are purified to meet safety standards.

Research notes

The Cosmetic Ingredient Review (CIR) panel has reviewed PEGs and concluded they are safe for use in cosmetics. Studies show that high-molecular-weight PEGs like PEG-160M do not penetrate the skin significantly, reducing the risk of systemic exposure.

Common label clues

Typical concentration
0.1% to 2%
Regulatory status
Approved for use in cosmetics by the FDA and the European Commission. The Cosmetic Ingredient Review (CIR) panel has deemed PEGs safe as used in cosmetics when properly formulated.
Common uses
Creams, Lotions, Serums, Hair products
Environmental note
PEG-160M is synthetic and not biodegradable, which may be a concern for environmentally conscious consumers. However, it is used in very small amounts in rinse-off products.

Good to know

  • PEG-160M is often used in combination with other thickeners to achieve the perfect texture.
  • The number '160M' refers to its molecular weight, which is very high compared to other PEGs.

Common questions

What is PEG-160M in beauty products?

PEG-160M is a type of polyethylene glycol (PEG) with a very large molecule size. In skincare, it acts as a thickener and binder, helping to give creams and lotions a smooth, rich texture. Because its molecules are too large to absorb into the skin, it stays on the surface and is generally considered non-irritating and non-comedogenic (won't clog pores). It's a common ingredient in many cosmetic formulations for its ability to improve consistency and stability.

What does PEG-160M do in a beauty product?

In a cosmetic product, PEG-160M dissolves in water and forms a gel-like network that increases the viscosity of the formula. This gives the product a thicker, more luxurious feel and helps suspend other ingredients evenly. It also acts as a binder, helping to hold the formula together and improve its stability over time.

Is PEG-160M safe for most people?

PEG-160M is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. The main safety concern is potential contamination with ethylene oxide or 1,4-dioxane during manufacturing, but cosmetic-grade PEGs are purified to meet safety standards.

Who should be careful with PEG-160M?

Those who strictly avoid synthetic ingredients Individuals with known allergies to PEG compounds (rare)

Research sources

Cosmetic Ingredient Review (CIR) - Safety Assessment of PEGsOpenFDA - Polyethylene Glycol (PEG) in CosmeticsOpenPubChem - PEG-160MOpen

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.