Ingredient review

Cetearamidoethyldiethonium Succinoyl Hydrolyzed Pea Protein

INCI: CETEARAMIDOETHYLDIETHONIUM SUCCINOYL HYDROLYZED PEA PROTEIN

A gentle, plant-derived conditioning ingredient that helps repair and protect hair without weighing it down.

beautyhaircareconditioning agent

In plain English

This ingredient is a modified protein made from peas. It's been chemically tweaked so it sticks to hair better, forming a thin, invisible film that smooths the cuticle (the outer layer of hair). This reduces frizz, adds shine, and makes hair feel softer and easier to comb. Because it's derived from a plant protein, it's often used in gentler or more natural hair products.

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

Quick decision guide

Useful, but context matters

Cetearamidoethyldiethonium Succinoyl Hydrolyzed Pea Protein 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 Cetearamidoethyldiethonium Succinoyl Hydrolyzed Pea Protein.
  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

A semi-synthetic conditioning polymer created by combining hydrolyzed pea protein with a quaternary ammonium compound (cetearamidoethyldiethonium) and succinic acid. This structure gives it a positive charge that helps it bind to negatively charged hair fibers.

How it works

The positively charged part of the molecule is attracted to the negative charge on damaged or wet hair. It deposits a thin, even layer that fills in gaps in the hair cuticle, smoothing the surface. This reduces friction between strands, preventing tangles and breakage, and helps lock in moisture.

Pros

Lightweight conditioning

It smooths hair without leaving a heavy, greasy feel, making it ideal for daily use or fine hair that still needs some frizz control.

Plant-derived base

The protein comes from peas, a renewable and generally hypoallergenic source, which is a plus for those seeking more natural ingredients.

Cons and cautions

Semi-synthetic nature

Although the base is plant-derived, the ingredient is chemically modified, which may not align with strict 'natural-only' preferences.

Potential for buildup

Overuse or high concentrations could lead to minor protein buildup on hair, especially if not clarified periodically, though this is less common than with heavier proteins.

Best for

  • People with dry, damaged, or color-treated hair
  • Those looking for a lightweight conditioner that won't weigh hair down

Use caution if

  • Individuals with very fine or thin hair who prefer no conditioning ingredients at all
  • Those strictly avoiding any semi-synthetic ingredients

Usage tips

Use in a conditioner or leave-in product for best results, as it needs time to bind to hair.
If you have fine hair, start with a product that lists this ingredient lower on the label to avoid over-conditioning.

Safety summary

Considered safe for use in rinse-off and leave-on hair products at typical concentrations. Low irritation and sensitization potential based on ingredient class and related protein derivatives.

Research notes

There are no large-scale human studies specifically on this ingredient, but it belongs to a well-studied class of cationic conditioning polymers. Its efficacy is supported by general cosmetic chemistry principles and manufacturer data.

Common label clues

Typical concentration
0.5% to 3%
Regulatory status
Approved for use in cosmetics in the EU, US, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
Common uses
Shampoos, Conditioners, Hair masks, Leave-in treatments
Environmental note
Pea protein is a relatively sustainable crop, but the chemical modification process may involve solvents and energy. Biodegradability data is limited for this specific compound.

Good to know

  • This ingredient is often found in 'repairing' or 'smoothing' hair product lines.
  • It is compatible with most other conditioning agents and surfactants.

Common questions

What is Cetearamidoethyldiethonium Succinoyl Hydrolyzed Pea Protein in beauty products?

This ingredient is a modified protein made from peas. It's been chemically tweaked so it sticks to hair better, forming a thin, invisible film that smooths the cuticle (the outer layer of hair). This reduces frizz, adds shine, and makes hair feel softer and easier to comb. Because it's derived from a plant protein, it's often used in gentler or more natural hair products.

What does Cetearamidoethyldiethonium Succinoyl Hydrolyzed Pea Protein do in a beauty product?

The positively charged part of the molecule is attracted to the negative charge on damaged or wet hair. It deposits a thin, even layer that fills in gaps in the hair cuticle, smoothing the surface. This reduces friction between strands, preventing tangles and breakage, and helps lock in moisture.

Is Cetearamidoethyldiethonium Succinoyl Hydrolyzed Pea Protein safe for most people?

Considered safe for use in rinse-off and leave-on hair products at typical concentrations. Low irritation and sensitization potential based on ingredient class and related protein derivatives.

Who should be careful with Cetearamidoethyldiethonium Succinoyl Hydrolyzed Pea Protein?

Individuals with very fine or thin hair who prefer no conditioning ingredients at all Those strictly avoiding any semi-synthetic ingredients

Research sources

CosIng - European Commission databaseOpenPersonal Care Council - Safety Review of Hydrolyzed ProteinsOpenPubMed - Cationic polymers in hair careOpen

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.