Ingredient review
Sodium Myristoyl Methyl Beta-Alanine
INCI: SODIUM MYRISTOYL METHYL BETA-ALANINE
A gentle, amino-acid-based surfactant that effectively cleanses while respecting the skin barrier.
In plain English
Sodium Myristoyl Methyl Beta-Alanine is a mild cleansing ingredient made from a fatty acid (myristic acid, often from coconut or palm) and the amino acid beta-alanine. It works by helping water mix with oil and dirt so they can be rinsed away, but it's much gentler than traditional sulfates, so it doesn't strip your skin of its natural moisture. You'll find it in creamy, non-foaming or low-foaming cleansers designed for sensitive or dry skin.
Review score
Safety, usefulness, and evidence
Strong fit for many routines
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
Easy yes for most routines
Sodium Myristoyl Methyl Beta-Alanine 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 Methyl Beta-Alanine.
- 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 semi-synthetic surfactant derived from myristic acid (a fatty acid found in coconut and palm oils) and beta-alanine (an amino acid). It belongs to the class of acyl amino acid surfactants known for their mildness.
How it works
It reduces the surface tension between water and oil, allowing dirt, sebum, and makeup to be emulsified and rinsed away. Its large molecular structure and amino-acid head group make it less penetrating and less irritating than smaller, harsher surfactants like sodium lauryl sulfate.
Pros
Extremely gentle on skin
Its large molecular structure and amino-acid base mean it cleanses without disrupting the skin barrier, making it ideal for sensitive or compromised skin.
Leaves skin feeling soft
Unlike many harsh cleansers that leave a tight, dry feeling, this surfactant helps maintain moisture, so skin feels comfortable post-wash.
Cons and cautions
Low foam production
It produces a creamy, low-lather experience. If you enjoy a rich, bubbly foam, you may need to adjust expectations or pair it with a foaming booster.
Potential palm oil sourcing
Myristic acid is often derived from palm oil. Without certified sustainable sourcing, this can contribute to deforestation concerns.
Best for
- People with dry, sensitive, or eczema-prone skin looking for a gentle cleanser
- Anyone wanting to avoid harsh sulfates in their daily face wash
Use caution if
- Those who prefer a rich, bubbly lather may find this surfactant too low-foaming
Usage tips
Safety summary
Sodium Myristoyl Methyl Beta-Alanine is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, and no significant safety concerns have been raised by regulatory bodies or dermatological reviews.
Research notes
Amino-acid surfactants like this one are well-studied for their mildness and skin compatibility. While specific large-scale human trials for this exact compound are limited, the broader class of acyl amino acid surfactants is supported by decades of safe use and dermatological research.
Common label clues
- Typical concentration
- 1–15% in rinse-off products; lower in leave-on formulations
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most major markets. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Facial cleansers, Body washes, Shampoos, Makeup removers
- Environmental note
- Biodegradable, but the fatty acid source (often palm or coconut) should be sustainably sourced to minimize environmental impact.
Good to know
- It is often listed near the top of ingredient lists in sulfate-free cleansers.
- This surfactant is compatible with a wide pH range (5.5–7.0), making it easy to formulate into gentle, skin-friendly cleansers.
Common questions
What is Sodium Myristoyl Methyl Beta-Alanine in beauty products?
Sodium Myristoyl Methyl Beta-Alanine is a mild cleansing ingredient made from a fatty acid (myristic acid, often from coconut or palm) and the amino acid beta-alanine. It works by helping water mix with oil and dirt so they can be rinsed away, but it's much gentler than traditional sulfates, so it doesn't strip your skin of its natural moisture. You'll find it in creamy, non-foaming or low-foaming cleansers designed for sensitive or dry skin.
What does Sodium Myristoyl Methyl Beta-Alanine do in a beauty product?
It reduces the surface tension between water and oil, allowing dirt, sebum, and makeup to be emulsified and rinsed away. Its large molecular structure and amino-acid head group make it less penetrating and less irritating than smaller, harsher surfactants like sodium lauryl sulfate.
Is Sodium Myristoyl Methyl Beta-Alanine safe for most people?
Sodium Myristoyl Methyl Beta-Alanine is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, and no significant safety concerns have been raised by regulatory bodies or dermatological reviews.
Who should be careful with Sodium Myristoyl Methyl Beta-Alanine?
Those who prefer a rich, bubbly lather may find this surfactant too low-foaming
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.