Ingredient review
TEA-Cocoyl Hydrolyzed Soy Protein
INCI: TEA-Cocoyl Hydrolyzed Soy Protein
A mild, protein-based surfactant that cleanses gently while helping hair and skin feel soft and conditioned.
In plain English
This ingredient is a mild cleanser made by combining coconut fatty acids with soy protein. It helps remove dirt and oil without stripping your skin or hair of their natural moisture, leaving them feeling soft rather than tight or dry. Think of it as a gentle soap that also adds a little conditioning.
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
TEA-Cocoyl Hydrolyzed Soy 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging TEA-Cocoyl Hydrolyzed Soy Protein.
- 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
A surfactant (cleansing agent) created by reacting coconut oil fatty acids with hydrolyzed soy protein, then neutralizing with triethanolamine (TEA). It is a mild, anionic surfactant often used in sulfate-free or gentle cleansing formulas.
How it works
It works by lowering the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. The soy protein portion helps bind to hair and skin, leaving a thin conditioning film that reduces friction and improves feel.
Pros
Mild on skin
This surfactant is much gentler than sodium lauryl sulfate, making it suitable for daily use on sensitive or dry skin.
Adds softness
The soy protein component leaves a light conditioning film, so your skin or hair feels softer after washing compared to harsher cleansers.
Cons and cautions
Potential for irritation in high doses
While generally mild, very high concentrations (above 10%) can still cause mild irritation for some people, especially those with very reactive skin.
TEA-related concerns
Triethanolamine (TEA) can theoretically form nitrosamines (potential carcinogens) if combined with nitrosating agents, but this is extremely rare in properly formulated products and is regulated.
Best for
- People with dry or sensitive skin looking for a gentle cleanser
- Those who want a sulfate-free shampoo that still cleanses effectively
Use caution if
- Individuals with a known allergy to soy or coconut-derived ingredients
Usage tips
Safety summary
Considered safe for use in cosmetics at typical concentrations. The main concern is the potential formation of nitrosamines from TEA, but this is well-controlled by good manufacturing practices and ingredient purity standards. Overall, it is a low-risk, gentle ingredient.
Research notes
Studies on hydrolyzed soy protein show it can improve hair strength and moisture retention. The surfactant itself is less studied individually, but its mildness is supported by its chemical structure and common use in sensitive-skin formulations.
Common label clues
- Typical concentration
- 1–10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. TEA is restricted to a maximum concentration of 5% in rinse-off products in the EU, and manufacturers must avoid nitrosamine formation.
- Common uses
- Facial cleansers, Body washes, Shampoos, Conditioners
- Environmental note
- Derived from renewable plant sources (coconut and soy), but the TEA component is synthetic. Biodegradability is generally good for the surfactant portion.
Good to know
- This ingredient is often found in 'sulfate-free' or 'gentle' cleansers.
- The soy protein portion can help improve the feel of hair by reducing static and adding slip.
Common questions
What is TEA-Cocoyl Hydrolyzed Soy Protein in beauty products?
This ingredient is a mild cleanser made by combining coconut fatty acids with soy protein. It helps remove dirt and oil without stripping your skin or hair of their natural moisture, leaving them feeling soft rather than tight or dry. Think of it as a gentle soap that also adds a little conditioning.
What does TEA-Cocoyl Hydrolyzed Soy Protein do in a beauty product?
It works by lowering the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. The soy protein portion helps bind to hair and skin, leaving a thin conditioning film that reduces friction and improves feel.
Is TEA-Cocoyl Hydrolyzed Soy Protein safe for most people?
Considered safe for use in cosmetics at typical concentrations. The main concern is the potential formation of nitrosamines from TEA, but this is well-controlled by good manufacturing practices and ingredient purity standards. Overall, it is a low-risk, gentle ingredient.
Who should be careful with TEA-Cocoyl Hydrolyzed Soy Protein?
Individuals with a known allergy to soy or coconut-derived ingredients
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.