Ingredient review
Sodium Stearoyl Hydrolyzed Corn Protein
INCI: Sodium Stearoyl Hydrolyzed Corn Protein
A mild, protein-derived cleansing agent that cleans without stripping the skin's natural moisture barrier.
In plain English
This ingredient is a gentle cleanser made by combining corn protein with stearic acid (a fatty acid found in shea butter and cocoa butter). It helps remove dirt and oil from skin and hair without causing dryness or irritation, making it a popular choice for sensitive skin formulas.
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 Stearoyl Hydrolyzed Corn Protein 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 Hydrolyzed Corn Protein.
- 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 Hydrolyzed Corn Protein is a semi-synthetic surfactant created by chemically bonding stearic acid (a fatty acid) with hydrolyzed (broken down) corn protein. It functions as a mild cleansing agent that also leaves skin and hair feeling soft and conditioned.
How it works
In a cosmetic product, this ingredient works by reducing the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its protein component helps it bind to the skin or hair surface, providing a gentle conditioning effect that reduces the tight, dry feeling often associated with harsher cleansers.
Pros
Mild on skin
Unlike harsher sulfates, this ingredient cleans effectively without stripping the skin's natural oils, reducing the risk of dryness and irritation.
Conditioning properties
The protein component helps leave skin and hair feeling soft and smooth after washing, improving post-cleansing comfort.
Cons and cautions
Lower foam
It produces less lather compared to traditional sulfates, which may be a downside for users who prefer a rich, bubbly cleanser.
Formulation sensitivity
Its cleansing performance can be influenced by the product's pH and other ingredients, so it may not work equally well in all formulas.
Best for
- People with dry or sensitive skin
- Those looking for a milder alternative to sodium lauryl sulfate
Use caution if
- Individuals with known corn allergies (rare, but possible)
- Those seeking very high-foaming cleansers
Usage tips
Safety summary
Sodium Stearoyl Hydrolyzed Corn Protein is considered safe for use in cosmetics. It has a low irritation and comedogenic risk, making it suitable for sensitive skin. As with any ingredient, patch testing is recommended for those with known allergies.
Research notes
While not extensively studied in isolation, the safety of hydrolyzed proteins and fatty acid derivatives in cosmetics is well-established. Its mildness is supported by its chemical structure and common use in sensitive-skin formulations.
Common label clues
- Typical concentration
- 1-5% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the US, EU, and other major markets. No specific restrictions known.
- Common uses
- Cleansers, Shampoos, Body washes, Facial washes
- Environmental note
- Derived from corn, a renewable resource, and is generally considered biodegradable, making it a more environmentally friendly surfactant choice.
Good to know
- This ingredient is often found in 'sulfate-free' formulations.
- It is biodegradable and derived from renewable plant sources.
Common questions
What is Sodium Stearoyl Hydrolyzed Corn Protein in beauty products?
This ingredient is a gentle cleanser made by combining corn protein with stearic acid (a fatty acid found in shea butter and cocoa butter). It helps remove dirt and oil from skin and hair without causing dryness or irritation, making it a popular choice for sensitive skin formulas.
What does Sodium Stearoyl Hydrolyzed Corn Protein do in a beauty product?
In a cosmetic product, this ingredient works by reducing the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its protein component helps it bind to the skin or hair surface, providing a gentle conditioning effect that reduces the tight, dry feeling often associated with harsher cleansers.
Is Sodium Stearoyl Hydrolyzed Corn Protein safe for most people?
Sodium Stearoyl Hydrolyzed Corn Protein is considered safe for use in cosmetics. It has a low irritation and comedogenic risk, making it suitable for sensitive skin. As with any ingredient, patch testing is recommended for those with known allergies.
Who should be careful with Sodium Stearoyl Hydrolyzed Corn Protein?
Individuals with known corn allergies (rare, but possible) Those seeking very high-foaming cleansers
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.