Ingredient review
TEA-Lauroyl Keratin Amino Acids
INCI: TEA-Lauroyl Keratin Amino Acids
A mild, protein-derived 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 lauric acid (from coconut or palm oil) with keratin amino acids (from wool or plant sources). It helps remove dirt and oil without stripping the skin or hair of their natural moisture, and it leaves a soft, conditioned feel. Think of it as a gentle soap that also adds a little protein to strengthen hair or support skin barrier function.
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-Lauroyl Keratin Amino Acids 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-Lauroyl Keratin Amino Acids.
- 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
TEA-Lauroyl Keratin Amino Acids is a surfactant (cleansing agent) created by reacting lauric acid with keratin amino acids, then neutralizing with triethanolamine (TEA). It is a semi-synthetic ingredient that combines the mild cleansing power of fatty acids with the conditioning benefits of keratin-derived proteins.
How it works
In a cosmetic product, this ingredient works by reducing the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. The keratin amino acid portion binds to the hair or skin surface, depositing a thin protein layer that helps retain moisture and reduce friction, leading to softer, smoother feel.
Pros
Mild on skin and hair
Unlike harsher sulfates, this surfactant cleanses without stripping natural oils, making it ideal for daily use on sensitive or dry skin and color-treated hair.
Adds conditioning benefits
The keratin amino acids deposit a thin protein film that helps reduce frizz, improve manageability, and leave skin feeling soft rather than tight.
Cons and cautions
Potential TEA sensitivity
Triethanolamine (TEA) can cause irritation in some individuals, especially in high concentrations or with prolonged contact. Most rinse-off products use safe levels, but those with very reactive skin may want to patch test.
Animal-derived keratin source
Keratin is often sourced from sheep wool or other animal by-products. Unless labeled as plant-based, this ingredient may not align with vegan or cruelty-free preferences.
Best for
- People with dry or sensitive skin looking for a mild cleanser
- Those with damaged or brittle hair wanting gentle cleansing with added conditioning
Use caution if
- Vegans or those avoiding animal-derived ingredients (unless plant-based keratin is used)
Usage tips
Safety summary
TEA-Lauroyl Keratin Amino Acids is considered safe for use in rinse-off cosmetics at typical concentrations. The TEA component has been reviewed by the Cosmetic Ingredient Review (CIR) panel and is safe when formulated properly. However, individuals with very sensitive skin or allergies to wool-derived proteins should patch test first.
Research notes
Research on keratin amino acid surfactants indicates they are milder than traditional sulfates and can improve hair strength and moisture retention. Studies on TEA-based surfactants show low irritation potential in rinse-off products, though more independent research on this specific compound is limited.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. TEA is restricted in some concentrations (e.g., EU limits TEA in leave-on products to 5%), but levels in rinse-off products are generally considered safe.
- Common uses
- Shampoos, Body washes, Facial cleansers, Hair conditioners
- Environmental note
- Keratin sourcing from wool is a by-product of the meat industry, which may have lower environmental impact than synthetic alternatives, but animal-derived ingredients raise ethical concerns for some consumers.
Good to know
- This ingredient is often listed near the middle or end of an ingredient list, indicating moderate concentration.
- It is compatible with other mild surfactants and can help reduce irritation in sulfate-free formulas.
Common questions
What is TEA-Lauroyl Keratin Amino Acids in beauty products?
This ingredient is a mild cleanser made by combining lauric acid (from coconut or palm oil) with keratin amino acids (from wool or plant sources). It helps remove dirt and oil without stripping the skin or hair of their natural moisture, and it leaves a soft, conditioned feel. Think of it as a gentle soap that also adds a little protein to strengthen hair or support skin barrier function.
What does TEA-Lauroyl Keratin Amino Acids do in a beauty product?
In a cosmetic product, this ingredient works by reducing the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. The keratin amino acid portion binds to the hair or skin surface, depositing a thin protein layer that helps retain moisture and reduce friction, leading to softer, smoother feel.
Is TEA-Lauroyl Keratin Amino Acids safe for most people?
TEA-Lauroyl Keratin Amino Acids is considered safe for use in rinse-off cosmetics at typical concentrations. The TEA component has been reviewed by the Cosmetic Ingredient Review (CIR) panel and is safe when formulated properly. However, individuals with very sensitive skin or allergies to wool-derived proteins should patch test first.
Who should be careful with TEA-Lauroyl Keratin Amino Acids?
Vegans or those avoiding animal-derived ingredients (unless plant-based keratin is used)
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.