Ingredient review
Ceramide-like Amino Acid Complex
INCI: Cetamido Lysinamido Polyaspartic Acid
A synthetic ingredient that mimics ceramides to help strengthen the skin barrier and improve moisture retention.
In plain English
Cetamido Lysinamido Polyaspartic Acid is a lab-made ingredient that acts like a ceramide—a natural fat in your skin that holds cells together and keeps moisture in. Think of it as a repair patch for your skin's outer layer, helping to seal gaps and prevent water loss. It's often used in moisturizers and barrier creams for dry or sensitive skin.
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
Ceramide-like Amino Acid Complex 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 Ceramide-like Amino Acid Complex.
- 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 peptide-like compound derived from amino acids (lysine and aspartic acid) and a ceramide-like fatty acid. It is designed to mimic the structure and function of natural ceramides in the skin.
How it works
It binds to the skin's surface and integrates into the lipid matrix between skin cells, reinforcing the barrier. This helps reduce transepidermal water loss (TEWL) and protects against environmental irritants.
Pros
Barrier-friendly
Helps repair and maintain the skin's protective outer layer, reducing dryness and irritation over time.
Gentle formula
Low irritation and comedogenic risk make it suitable for sensitive and acne-prone skin types.
Cons and cautions
Limited research
Most evidence comes from lab studies or small trials; large-scale human studies are still lacking.
Synthetic origin
Not a natural ingredient, which may be a concern for those seeking plant-based or naturally derived skincare.
Best for
- People with dry or dehydrated skin
- Those with a compromised skin barrier (e.g., from over-exfoliation or harsh weather)
Use caution if
- Individuals with known allergies to synthetic peptides (rare)
Usage tips
Safety summary
Generally recognized as safe for topical use at typical concentrations. No significant irritation or sensitization reported in available studies.
Research notes
Preliminary in vitro and small clinical studies suggest barrier-repair benefits, but more robust human trials are needed to confirm efficacy and compare with natural ceramides.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. Not classified as a drug.
- Common uses
- Moisturizers, Barrier repair creams, Anti-aging serums
- Environmental note
- Synthetic production reduces reliance on animal-derived ceramides, but the environmental impact of manufacturing is not well-documented.
Good to know
- Often combined with other barrier-supporting ingredients like niacinamide or fatty acids.
- Stable in most formulations and does not require special storage.
Common questions
What is Ceramide-like Amino Acid Complex in beauty products?
Cetamido Lysinamido Polyaspartic Acid is a lab-made ingredient that acts like a ceramide—a natural fat in your skin that holds cells together and keeps moisture in. Think of it as a repair patch for your skin's outer layer, helping to seal gaps and prevent water loss. It's often used in moisturizers and barrier creams for dry or sensitive skin.
What does Ceramide-like Amino Acid Complex do in a beauty product?
It binds to the skin's surface and integrates into the lipid matrix between skin cells, reinforcing the barrier. This helps reduce transepidermal water loss (TEWL) and protects against environmental irritants.
Is Ceramide-like Amino Acid Complex safe for most people?
Generally recognized as safe for topical use at typical concentrations. No significant irritation or sensitization reported in available studies.
Who should be careful with Ceramide-like Amino Acid Complex?
Individuals with known allergies to synthetic peptides (rare)
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.