Ingredient review
Myristyl Aspartic Acid
INCI: Myristyl Aspartic Acid
A mild, amino-acid-based cleanser that effectively removes impurities while being gentle on the skin barrier.
In plain English
Myristyl Aspartic Acid is a gentle cleansing ingredient made from myristyl alcohol (a fatty alcohol) and aspartic acid (an amino acid). It works as a surfactant, meaning it helps water mix with oil and dirt so they can be rinsed away. Unlike harsh soaps, it cleans without stripping your skin's natural moisture, making it a popular choice for sensitive or dry skin types.
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
Myristyl Aspartic Acid 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 Myristyl Aspartic Acid.
- 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
Myristyl Aspartic Acid is a semi-synthetic surfactant created by combining myristyl alcohol (derived from coconut or palm oil) with aspartic acid, an amino acid naturally found in the body. It belongs to the family of amino-acid-based cleansers, known for their mildness and compatibility with the skin's pH.
How it works
In a cosmetic product, Myristyl Aspartic Acid acts as a surfactant. Its molecular structure has a water-loving (hydrophilic) head and an oil-loving (lipophilic) tail. When you wash your face, the tails attach to oils and dirt, while the heads attach to water, allowing the impurities to be lifted away and rinsed off. Because it is derived from an amino acid, it tends to be less irritating than traditional sulfate-based cleansers.
Pros
Mild on skin
Myristyl Aspartic Acid cleanses without disrupting the skin's natural moisture barrier, reducing the risk of dryness or irritation.
pH-friendly
It works well at a skin-compatible pH (around 5.5), helping maintain a healthy acid mantle that protects against bacteria and environmental stressors.
Cons and cautions
Limited cleansing power
For those who wear heavy makeup or waterproof sunscreen, this ingredient may require a double-cleansing routine to fully remove all residue.
Sustainability concerns
The myristyl alcohol component is often derived from palm oil, which can be associated with deforestation unless certified sustainable sources are used.
Best for
- People with dry or sensitive skin looking for a gentle cleanser
- Those who prefer amino-acid-based, sulfate-free cleansing products
Use caution if
- Individuals who need a deep-cleansing formula for heavy makeup or very oily skin may find it too mild
Usage tips
Safety summary
Myristyl Aspartic Acid is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. No significant safety concerns have been reported in regulatory or dermatological literature.
Research notes
Amino-acid-based surfactants like Myristyl Aspartic Acid are well-studied for their mildness and skin compatibility. Research indicates they cause less protein denaturation and lipid extraction compared to traditional anionic surfactants like sodium lauryl sulfate, supporting their use in gentle cleansers.
Common label clues
- Typical concentration
- Typically 0.5% to 5% in rinse-off products
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database, with no known restrictions at typical concentrations.
- Common uses
- Facial cleansers, Body washes, Shampoos, Makeup removers
- Environmental note
- While the ingredient itself is biodegradable, the sourcing of myristyl alcohol from palm oil can have environmental impacts. Look for products using RSPO-certified palm oil or plant-based alternatives.
Good to know
- Myristyl Aspartic Acid is often found in 'amino acid cleansers' marketed for sensitive skin.
- It is biodegradable and generally considered environmentally safer than some traditional surfactants.
Common questions
What is Myristyl Aspartic Acid in beauty products?
Myristyl Aspartic Acid is a gentle cleansing ingredient made from myristyl alcohol (a fatty alcohol) and aspartic acid (an amino acid). It works as a surfactant, meaning it helps water mix with oil and dirt so they can be rinsed away. Unlike harsh soaps, it cleans without stripping your skin's natural moisture, making it a popular choice for sensitive or dry skin types.
What does Myristyl Aspartic Acid do in a beauty product?
In a cosmetic product, Myristyl Aspartic Acid acts as a surfactant. Its molecular structure has a water-loving (hydrophilic) head and an oil-loving (lipophilic) tail. When you wash your face, the tails attach to oils and dirt, while the heads attach to water, allowing the impurities to be lifted away and rinsed off. Because it is derived from an amino acid, it tends to be less irritating than traditional sulfate-based cleansers.
Is Myristyl Aspartic Acid safe for most people?
Myristyl Aspartic Acid is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. No significant safety concerns have been reported in regulatory or dermatological literature.
Who should be careful with Myristyl Aspartic Acid?
Individuals who need a deep-cleansing formula for heavy makeup or very oily skin may find it too mild
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.