Ingredient review
Disodium Soyamphodiacetate
INCI: DISODIUM SOYAMPHODIACETATE
A gentle, coconut-derived surfactant that cleanses effectively while being kind to sensitive skin.
In plain English
Disodium Soyamphodiacetate is a mild cleansing ingredient made from soybean fatty acids. It belongs to a class of surfactants called amphoacetates, which are known for being gentle on the skin and eyes. Unlike harsh soaps that can strip away natural oils, this ingredient helps remove dirt and makeup while maintaining the skin's moisture barrier. It is often used in products labeled as 'gentle' or 'for sensitive skin.'
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
Disodium Soyamphodiacetate 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 Disodium Soyamphodiacetate.
- 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
Disodium Soyamphodiacetate is a semi-synthetic surfactant derived from soybean oil. It is produced by reacting soybean fatty acids with other compounds to create a mild cleansing molecule that is less irritating than traditional sulfates.
How it works
In a cosmetic product, 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 amphoteric nature (it can act as either an acid or a base) makes it effective across a wide pH range and gentle on the skin's acid mantle.
Pros
Gentle on skin
This surfactant is much milder than sodium lauryl sulfate, making it ideal for daily use on sensitive or dry skin without causing tightness or irritation.
Eco-friendly profile
Derived from renewable soybean oil and biodegradable, it aligns with sustainable beauty practices and is often chosen for 'green' formulations.
Cons and cautions
Limited cleansing power
On its own, it may struggle to remove heavy makeup or waterproof products, so it is often blended with other surfactants for a deeper clean.
Potential soy allergen
Although rare, people with soy allergies could react to this ingredient, so it is not universally safe for all sensitive skin types.
Best for
- People with dry or sensitive skin looking for a gentle cleanser
- Those who prefer plant-derived ingredients over harsh sulfates
Use caution if
- Individuals with a known allergy to soy or soybean-derived ingredients
Usage tips
Safety summary
Disodium Soyamphodiacetate is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types. The main caution is for individuals with soy allergies.
Research notes
Research on amphoacetate surfactants, including disodium soyamphodiacetate, shows they are significantly milder than traditional anionic surfactants like SLS. Studies indicate they cause less protein denaturation and lipid extraction from the skin, supporting their use in gentle cleansers.
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. No concentration restrictions in rinse-off products.
- Common uses
- Facial cleansers, Body washes, Shampoos, Baby care products
- Environmental note
- Soy-derived and biodegradable, but soy farming can be associated with deforestation and pesticide use. Look for sustainably sourced soy if this is a concern.
Good to know
- Disodium Soyamphodiacetate is often used alongside other mild surfactants like cocamidopropyl betaine to boost foam and cleaning ability.
- It is considered safe for use in baby care products due to its low irritation profile.
Common questions
What is Disodium Soyamphodiacetate in beauty products?
Disodium Soyamphodiacetate is a mild cleansing ingredient made from soybean fatty acids. It belongs to a class of surfactants called amphoacetates, which are known for being gentle on the skin and eyes. Unlike harsh soaps that can strip away natural oils, this ingredient helps remove dirt and makeup while maintaining the skin's moisture barrier. It is often used in products labeled as 'gentle' or 'for sensitive skin.'
What does Disodium Soyamphodiacetate do in a beauty product?
In a cosmetic product, 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 amphoteric nature (it can act as either an acid or a base) makes it effective across a wide pH range and gentle on the skin's acid mantle.
Is Disodium Soyamphodiacetate safe for most people?
Disodium Soyamphodiacetate is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types. The main caution is for individuals with soy allergies.
Who should be careful with Disodium Soyamphodiacetate?
Individuals with a known allergy to soy or soybean-derived ingredients
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.