Ingredient review
Sodium Stearoyl Glutamate
INCI: Sodium Stearoyl Glutamate
A gentle, skin-friendly surfactant that cleanses effectively without the harshness of traditional sulfates.
In plain English
Sodium Stearoyl Glutamate is a mild cleansing ingredient made from natural fatty acids (from plant oils) and the amino acid glutamic acid. It helps remove dirt and oil from your skin and hair without stripping away too much moisture, so your skin feels clean but not tight or dry. Think of it as a kinder alternative to stronger detergents like sodium lauryl sulfate.
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 Stearoyl Glutamate 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 Stearoyl Glutamate.
- 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 Stearoyl Glutamate is a surfactant and emulsifier derived from stearic acid (a fatty acid found in coconut or palm oil) and glutamic acid (an amino acid). It belongs to the family of acyl glutamates, known for their mildness and biodegradability.
How it works
In a cleanser, this ingredient works by reducing the surface tension of water, allowing it to mix with oil and dirt so they can be rinsed away. Its molecular structure has a water-loving head and an oil-loving tail, making it effective at lifting impurities while being gentle on the skin's outer layer (the stratum corneum).
Pros
Very gentle on skin
Unlike sulfates, this surfactant cleans without stripping natural oils, making it ideal for daily use on sensitive or dry skin.
Supports moisture barrier
Its mild nature helps preserve the skin's protective barrier, reducing the risk of irritation and transepidermal water loss (water evaporating from the skin).
Cons and cautions
Sourcing concerns
Stearic acid is often derived from palm oil, which can be linked to deforestation. Look for sustainably sourced or RSPO-certified options.
Higher cost
Products with this ingredient may be pricier than those using conventional surfactants, though many find the gentleness worth the extra cost.
Best for
- People with dry or sensitive skin looking for a gentle cleanser
- Anyone wanting to avoid harsh sulfates in their skincare routine
Use caution if
- Individuals with a known allergy to any component of the ingredient (rare)
Usage tips
Safety summary
Sodium Stearoyl Glutamate is widely regarded as safe and non-irritating for topical use. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin.
Research notes
Acyl glutamates like Sodium Stearoyl Glutamate have been studied for their mildness and low skin irritation potential compared to traditional anionic surfactants. They are well-tolerated in rinse-off formulations and are considered safe by cosmetic ingredient review panels.
Common label clues
- Typical concentration
- 1–10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics worldwide, including by the U.S. FDA and the European Commission, with no known restrictions at typical concentrations.
- Common uses
- Facial cleansers, Body washes, Shampoos, Bar soaps
- Environmental note
- This ingredient is biodegradable, but its stearic acid source (often palm oil) can have environmental impacts. Choosing products with certified sustainable palm oil helps reduce this concern.
Good to know
- Sodium Stearoyl Glutamate is often found in 'amino acid' cleansers, which are marketed as pH-balanced and non-stripping.
- It is considered a secondary surfactant and is usually combined with other mild cleansers for optimal foam and feel.
Common questions
What is Sodium Stearoyl Glutamate in beauty products?
Sodium Stearoyl Glutamate is a mild cleansing ingredient made from natural fatty acids (from plant oils) and the amino acid glutamic acid. It helps remove dirt and oil from your skin and hair without stripping away too much moisture, so your skin feels clean but not tight or dry. Think of it as a kinder alternative to stronger detergents like sodium lauryl sulfate.
What does Sodium Stearoyl Glutamate do in a beauty product?
In a cleanser, this ingredient works by reducing the surface tension of water, allowing it to mix with oil and dirt so they can be rinsed away. Its molecular structure has a water-loving head and an oil-loving tail, making it effective at lifting impurities while being gentle on the skin's outer layer (the stratum corneum).
Is Sodium Stearoyl Glutamate safe for most people?
Sodium Stearoyl Glutamate is widely regarded as safe and non-irritating for topical use. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin.
Who should be careful with Sodium Stearoyl Glutamate?
Individuals with a known allergy to any component of the ingredient (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.