Ingredient review
Sodium Myristoyl Sarcosinate
INCI: Sodium Myristoyl Sarcosinate
A mild, amino-acid-based surfactant that cleanses effectively while being gentle on the skin barrier.
In plain English
Sodium Myristoyl Sarcosinate is a gentle cleansing ingredient often used in facial washes and shampoos. It helps lift away dirt, oil, and makeup without stripping your skin of its natural moisture. Because it is derived from sarcosine (an amino acid) and myristic acid (a fatty acid found in coconut oil), it is considered milder than traditional sulfate cleansers like SLS or SLES.
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
Sodium Myristoyl Sarcosinate 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 Sodium Myristoyl Sarcosinate.
- 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
Sodium Myristoyl Sarcosinate is a surfactant—a molecule that helps water mix with oil and dirt so they can be rinsed away. It belongs to the sarcosinate family, which are known for being gentle on skin and hair.
How it works
In a cleanser, this ingredient reduces the surface tension of water, allowing it to penetrate oils and debris on the skin. It forms micelles that trap impurities, which are then rinsed off. Unlike harsher surfactants, it has a larger molecular structure that is less likely to penetrate and irritate the skin barrier.
Pros
Mild on skin
Its amino-acid structure makes it less likely to cause irritation or dryness compared to traditional sulfates, making it suitable for daily use on sensitive skin.
Good lather
Creates a rich, creamy foam that feels pleasant during cleansing without leaving a tight or stripped feeling afterward.
Cons and cautions
Moderate cleansing power
While effective for daily dirt and light makeup, it may not fully remove heavy, waterproof cosmetics without a double-cleanse step.
Potential for slight dryness at high levels
In formulas where it is used as the primary surfactant at high concentrations, some users with very dry skin may notice mild tightness.
Best for
- People with dry or sensitive skin looking for a gentle cleanser
- Those who prefer sulfate-free cleansing options
Use caution if
- Individuals with known allergies to coconut-derived fatty acids (rare)
Usage tips
Safety summary
Sodium Myristoyl Sarcosinate is considered safe for use in cosmetics. It has low irritation and comedogenic potential, and is well-tolerated by most skin types, including sensitive skin.
Research notes
Studies on sarcosinate surfactants indicate they are mild to the skin and eyes, with good foaming and cleansing properties. They are often recommended as alternatives to harsher anionic surfactants in formulations for sensitive skin.
Common label clues
- Typical concentration
- 1–10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission. Generally recognized as safe when used as directed.
- Common uses
- Facial cleansers, Body washes, Shampoos, Makeup removers
- Environmental note
- Sarcosinates are biodegradable and have a lower aquatic toxicity profile compared to many traditional surfactants, making them a more environmentally friendly choice.
Good to know
- Sarcosinates are often derived from coconut oil and amino acids, making them biodegradable and generally considered eco-friendly.
- This ingredient is frequently used in 'sulfate-free' and 'gentle' labeled products.
Common questions
What is Sodium Myristoyl Sarcosinate in beauty products?
Sodium Myristoyl Sarcosinate is a gentle cleansing ingredient often used in facial washes and shampoos. It helps lift away dirt, oil, and makeup without stripping your skin of its natural moisture. Because it is derived from sarcosine (an amino acid) and myristic acid (a fatty acid found in coconut oil), it is considered milder than traditional sulfate cleansers like SLS or SLES.
What does Sodium Myristoyl Sarcosinate do in a beauty product?
In a cleanser, this ingredient reduces the surface tension of water, allowing it to penetrate oils and debris on the skin. It forms micelles that trap impurities, which are then rinsed off. Unlike harsher surfactants, it has a larger molecular structure that is less likely to penetrate and irritate the skin barrier.
Is Sodium Myristoyl Sarcosinate safe for most people?
Sodium Myristoyl Sarcosinate is considered safe for use in cosmetics. It has low irritation and comedogenic potential, and is well-tolerated by most skin types, including sensitive skin.
Who should be careful with Sodium Myristoyl Sarcosinate?
Individuals with known allergies to coconut-derived fatty acids (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.