Ingredient review
Trisodium Tetramethylhexadecenylcysteine Bis-Carboxymethyl Formylamine
INCI: TRISODIUM TETRAMETHYLHEXADECENYLCYSTEINE BIS-CARBOXYMETHYL FORMYLAMINE
A novel synthetic amino-acid derivative that may help improve skin feel and hydration, but independent research is limited.
In plain English
This ingredient is a lab-made compound derived from an amino acid (cysteine). In skincare, it's added to help the skin feel smoother and more hydrated. Think of it as a modern, high-tech helper that sits on the skin's surface to improve texture, but it's not a natural or widely studied ingredient yet.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Trisodium Tetramethylhexadecenylcysteine Bis-Carboxymethyl Formylamine 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 Trisodium Tetramethylhexadecenylcysteine Bis-Carboxymethyl Formylamine.
- 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
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A synthetic molecule created by chemically modifying the amino acid cysteine. It belongs to a class of ingredients designed to condition the skin by forming a thin, protective film.
How it works
It likely works by binding to the outer layer of the skin (the stratum corneum), helping to reduce water loss and temporarily smoothing the skin's surface. This can make the skin feel softer and look more even.
Pros
Novel skin feel
May provide a unique, silky after-feel on the skin that some users find luxurious.
Low irritation potential
Available data suggests it is generally non-irritating and non-comedogenic, making it suitable for many skin types.
Cons and cautions
Limited research
There are very few peer-reviewed studies on this specific ingredient, so its long-term benefits and safety are not well established.
Synthetic origin
It is entirely lab-made, which may be a drawback for consumers seeking natural or plant-derived ingredients.
Best for
- People looking for a modern skin-conditioning agent in anti-aging products
- Those with normal to dry skin who want extra surface hydration
Use caution if
- Individuals with known sensitivities to synthetic amino-acid derivatives
- Anyone seeking ingredients with strong clinical backing
Usage tips
Safety summary
Based on limited available data, this ingredient appears to have low irritation and comedogenic potential. However, due to the lack of comprehensive safety studies, it is best suited for occasional use in well-formulated products.
Research notes
There is minimal published research on this specific molecule. Most information comes from manufacturer data and ingredient safety databases. It is considered an emerging ingredient with promising but unproven benefits.
Common label clues
- Typical concentration
- 0.1% to 1%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets, but not specifically reviewed by the Cosmetic Ingredient Review (CIR) panel as of 2025.
- Common uses
- Anti-aging serums, Moisturizers, Eye creams
- Environmental note
- As a synthetic compound, its environmental persistence and biodegradability are not well documented. It is not known to be derived from endangered or unsustainable sources.
Good to know
- This ingredient is often found in high-end, luxury skincare formulations.
- It is not a common ingredient, so you may need to check the full ingredient list of premium products to find it.
Common questions
What is Trisodium Tetramethylhexadecenylcysteine Bis-Carboxymethyl Formylamine in beauty products?
This ingredient is a lab-made compound derived from an amino acid (cysteine). In skincare, it's added to help the skin feel smoother and more hydrated. Think of it as a modern, high-tech helper that sits on the skin's surface to improve texture, but it's not a natural or widely studied ingredient yet.
What does Trisodium Tetramethylhexadecenylcysteine Bis-Carboxymethyl Formylamine do in a beauty product?
It likely works by binding to the outer layer of the skin (the stratum corneum), helping to reduce water loss and temporarily smoothing the skin's surface. This can make the skin feel softer and look more even.
Is Trisodium Tetramethylhexadecenylcysteine Bis-Carboxymethyl Formylamine safe for most people?
Based on limited available data, this ingredient appears to have low irritation and comedogenic potential. However, due to the lack of comprehensive safety studies, it is best suited for occasional use in well-formulated products.
Who should be careful with Trisodium Tetramethylhexadecenylcysteine Bis-Carboxymethyl Formylamine?
Individuals with known sensitivities to synthetic amino-acid derivatives Anyone seeking ingredients with strong clinical backing
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.