Ingredient review

Talloweth-18

INCI: TALLOWETH-18

Talloweth-18 is an effective emulsifier derived from animal fat, but its moderate irritation and comedogenic potential make it better suited for rinse-off cleansers than leave-on products.

beautyskincaresurfactant

In plain English

Talloweth-18 is a semi-synthetic ingredient made by attaching polyethylene glycol (PEG) chains to tallow fatty acids (rendered animal fat). In skincare, it helps oil and water mix together, so it's often used in cleansers and shampoos to create a stable, creamy texture. Because it can be slightly irritating and may clog pores, it's more common in products you rinse off quickly rather than leave on your skin.

Review score

Safety, usefulness, and evidence

3.8Good
3.8/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Main practical flags: irritation is moderate; clogging risk is moderate.

Source
semi synthetic
Evidence
moderate
Irritation
moderate
Clogging risk
moderate
How reviews are scored

Quick decision guide

Useful, but context matters

Talloweth-18 can be useful, but watch for some irritation potential and possible clogging concerns.

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 Talloweth-18.
  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

moderate

Can bother some users, especially with frequent use, damaged skin, or strong companion ingredients.

Clogging risk

moderate

May be fine for many users but deserves caution if you are breakout-prone.

Evidence level

moderate

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

What it is

Talloweth-18 is a PEGylated tallow fatty acid, meaning it's a chemically modified version of animal-derived fats combined with PEG chains to improve water solubility and emulsifying properties.

How it works

In a cosmetic product, Talloweth-18 acts as an emulsifier and surfactant. It reduces the surface tension between oil and water, allowing them to blend into a stable cream or lotion. It also helps lift dirt and oil from the skin or hair, making it easier to rinse away.

Pros

Effective emulsifier

Talloweth-18 reliably blends oil and water, giving cleansers and creams a stable, smooth consistency without separating.

Good cleansing power

As a surfactant, it helps remove excess oil, dirt, and makeup from skin and hair, making it useful in shampoos and body washes.

Cons and cautions

Moderate irritation risk

For sensitive skin, Talloweth-18 can cause redness or stinging, especially in leave-on products. It's safer in rinse-off formulas.

May clog pores

With moderate comedogenic potential, this ingredient could contribute to breakouts for acne-prone individuals, particularly in leave-on creams.

Best for

  • People with normal to oily skin looking for effective cleansers
  • Those who prefer traditional, cost-effective emulsifiers in rinse-off products

Use caution if

  • Individuals with sensitive or reactive skin
  • Those with acne-prone skin who avoid moderate comedogenic ingredients
  • Vegans or those seeking plant-based alternatives

Usage tips

Use in rinse-off products like cleansers or shampoos to minimize skin contact time.
If you have sensitive skin, patch test before using a product containing Talloweth-18.
Pair with soothing ingredients like aloe or chamomile to reduce potential irritation.

Safety summary

Talloweth-18 is generally safe for use in rinse-off cosmetics at typical concentrations. It poses a moderate risk of irritation and comedogenicity, so it's best avoided in leave-on products for sensitive or acne-prone skin. Regulatory bodies consider it safe when used as intended.

Research notes

Studies on PEG tallowates indicate low acute toxicity and skin sensitization potential. The CIR panel concluded that PEG tallowates are safe in rinse-off products, but data on leave-on use is limited. Most evidence comes from industry safety assessments rather than independent clinical trials.

Common label clues

Typical concentration
Typically 1–5% in rinse-off products; lower in leave-on formulations
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated PEG tallowates and found them safe for use in rinse-off products at typical concentrations.
Common uses
Cleansers, Shampoos, Body washes, Bar soaps
Environmental note
Tallow is a byproduct of the meat industry, so its use can be seen as reducing waste. However, PEG derivatives may have moderate biodegradability concerns depending on chain length.

Good to know

  • Talloweth-18 is often listed as PEG-18 Tallowate on labels.
  • It is derived from tallow (rendered beef or mutton fat), so it is not vegan.
  • PEG compounds can sometimes contain trace impurities like ethylene oxide, but cosmetic-grade versions are purified.

Common questions

What is Talloweth-18 in beauty products?

Talloweth-18 is a semi-synthetic ingredient made by attaching polyethylene glycol (PEG) chains to tallow fatty acids (rendered animal fat). In skincare, it helps oil and water mix together, so it's often used in cleansers and shampoos to create a stable, creamy texture. Because it can be slightly irritating and may clog pores, it's more common in products you rinse off quickly rather than leave on your skin.

What does Talloweth-18 do in a beauty product?

In a cosmetic product, Talloweth-18 acts as an emulsifier and surfactant. It reduces the surface tension between oil and water, allowing them to blend into a stable cream or lotion. It also helps lift dirt and oil from the skin or hair, making it easier to rinse away.

Is Talloweth-18 safe for most people?

Talloweth-18 is generally safe for use in rinse-off cosmetics at typical concentrations. It poses a moderate risk of irritation and comedogenicity, so it's best avoided in leave-on products for sensitive or acne-prone skin. Regulatory bodies consider it safe when used as intended.

Who should be careful with Talloweth-18?

Individuals with sensitive or reactive skin Those with acne-prone skin who avoid moderate comedogenic ingredients Vegans or those seeking plant-based alternatives

Research sources

Cosmetic Ingredient Review (CIR) – Safety Assessment of PEG TallowatesOpenPubChem – Talloweth-18 Compound SummaryOpenEWG Skin Deep – Talloweth-18Open

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.