Ingredient review
Palmitoyl Myristyl Serinate
INCI: Palmitoyl Myristyl Serinate
A gentle, amino-acid-based ingredient that helps condition skin and stabilize formulas without common irritation.
In plain English
Palmitoyl Myristyl Serinate is a synthetic ingredient made by combining fatty acids (palmitic and myristic acids) with the amino acid serine. In skincare, it acts as a mild emulsifier (helping oil and water mix) and a skin conditioner, leaving skin feeling soft and smooth. It is considered very gentle and unlikely to clog pores or cause irritation, making it suitable for sensitive skin.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Palmitoyl Myristyl Serinate 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 Palmitoyl Myristyl Serinate.
- 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 synthetic compound formed by esterifying palmitic acid and myristic acid with serine, an amino acid naturally found in the skin. It functions primarily as a skin-conditioning agent and an oil-in-water emulsifier.
How it works
It helps blend water and oil phases in a formula, creating a stable, creamy texture. On the skin, it deposits a thin, non-greasy film that improves softness and smoothness, while also supporting the skin's natural barrier function.
Pros
Gentle on skin
Palmitoyl Myristyl Serinate has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Improves texture
It leaves skin feeling soft and smooth without a heavy or greasy residue, enhancing the sensory experience of a product.
Cons and cautions
Synthetic origin
As a lab-made ingredient, it may not appeal to consumers who prefer naturally derived or 'clean' formulations.
Limited research
While generally considered safe, there is less independent research on this specific compound compared to more common emulsifiers.
Best for
- People with sensitive or reactive skin
- Anyone looking for a non-greasy moisturizer or serum
Use caution if
- Those seeking exclusively natural or plant-based ingredients
Usage tips
Safety summary
Palmitoyl Myristyl Serinate is considered safe for use in cosmetics at typical concentrations. It has a low potential for skin irritation, sensitization, and comedogenicity. Regulatory bodies have not raised significant safety concerns.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel and other bodies have concluded that this ingredient is safe as used. Most evidence comes from formulation chemistry and safety testing rather than clinical efficacy studies.
Common label clues
- Typical concentration
- 0.5% to 3%
- Regulatory status
- Approved for use in cosmetics by the EU, US FDA, and other major regulators. No known restrictions at typical use levels.
- Common uses
- Moisturizers, Serums, Cleansers, Barrier creams
- Environmental note
- Synthesized from renewable fatty acids and amino acids; considered biodegradable and not persistent in the environment.
Good to know
- It is often used in 'skin-identical' formulas because serine is a natural component of the skin's moisture barrier.
- Despite its synthetic nature, it is biodegradable and not considered a microplastic.
Common questions
What is Palmitoyl Myristyl Serinate in beauty products?
Palmitoyl Myristyl Serinate is a synthetic ingredient made by combining fatty acids (palmitic and myristic acids) with the amino acid serine. In skincare, it acts as a mild emulsifier (helping oil and water mix) and a skin conditioner, leaving skin feeling soft and smooth. It is considered very gentle and unlikely to clog pores or cause irritation, making it suitable for sensitive skin.
What does Palmitoyl Myristyl Serinate do in a beauty product?
It helps blend water and oil phases in a formula, creating a stable, creamy texture. On the skin, it deposits a thin, non-greasy film that improves softness and smoothness, while also supporting the skin's natural barrier function.
Is Palmitoyl Myristyl Serinate safe for most people?
Palmitoyl Myristyl Serinate is considered safe for use in cosmetics at typical concentrations. It has a low potential for skin irritation, sensitization, and comedogenicity. Regulatory bodies have not raised significant safety concerns.
Who should be careful with Palmitoyl Myristyl Serinate?
Those seeking exclusively natural or plant-based 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.