Ingredient review
Disoyamine
INCI: DISOYAMINE
Disoyamine is a functional surfactant that helps cleansers foam and rinse cleanly, but it may be slightly drying or irritating for sensitive skin.
In plain English
Disoyamine is a cleaning ingredient made from soy fatty acids. It helps water and oil mix together so that dirt and makeup can be washed away. You'll find it in shampoos and face washes, where it creates a nice lather. However, because it is a surfactant, it can strip the skin's natural oils if used too often, which might leave dry or sensitive skin feeling tight.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Disoyamine can be useful, but watch for some irritation potential.
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 Disoyamine.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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
Disoyamine is a semi-synthetic surfactant derived from soybean oil fatty acids. It belongs to the amine oxide family of surfactants, which are known for their ability to boost foam and stabilize emulsions.
How it works
Disoyamine works by reducing the surface tension between water and oil, allowing them to mix. In a cleanser, it helps lift dirt, oil, and makeup from the skin so they can be rinsed away. It also helps create a rich, creamy lather.
Pros
Good foam booster
Disoyamine helps create a rich, stable lather in shampoos and face washes, making the cleansing experience feel satisfying.
Effective emulsifier
It helps blend oil and water in formulas, ensuring that products stay mixed and work consistently from first use to last.
Cons and cautions
Can be drying
As a surfactant, disoyamine can strip natural oils from the skin, which may lead to tightness or irritation, especially for dry or sensitive skin types.
Moderate irritation potential
Some people may experience mild stinging or redness, particularly if the product is left on the skin for a long time (e.g., in a leave-on formula).
Best for
- People with normal to oily skin looking for a foaming cleanser
- Those who prefer sulfate-free but still foaming surfactants
Use caution if
- Individuals with very dry or compromised skin barriers
- Anyone with known sensitivity to amine oxides or soy derivatives
Usage tips
Safety summary
Disoyamine is considered safe for use in rinse-off cosmetics at typical concentrations. It may cause mild irritation in sensitive individuals, especially with prolonged contact. Avoid eye contact and discontinue use if irritation occurs.
Research notes
Limited peer-reviewed studies specifically on disoyamine. As an amine oxide surfactant, its safety profile is supported by broader surfactant research and regulatory reviews. The Cosmetic Ingredient Review (CIR) has evaluated related amine oxides and found them safe when formulated to be non-irritating.
Common label clues
- Typical concentration
- Typically 0.5–5% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Cleansers, Shampoos, Body washes, Emulsions
- Environmental note
- Derived from renewable soybean oil, but the synthesis process involves chemical modification. Biodegradability data is limited; however, amine oxides are generally considered biodegradable.
Good to know
- Disoyamine is considered a milder alternative to sodium lauryl sulfate (SLS), but it is not as gentle as some non-ionic surfactants.
- It is often used in combination with other surfactants to balance cleansing power and mildness.
Common questions
What is Disoyamine in beauty products?
Disoyamine is a cleaning ingredient made from soy fatty acids. It helps water and oil mix together so that dirt and makeup can be washed away. You'll find it in shampoos and face washes, where it creates a nice lather. However, because it is a surfactant, it can strip the skin's natural oils if used too often, which might leave dry or sensitive skin feeling tight.
What does Disoyamine do in a beauty product?
Disoyamine works by reducing the surface tension between water and oil, allowing them to mix. In a cleanser, it helps lift dirt, oil, and makeup from the skin so they can be rinsed away. It also helps create a rich, creamy lather.
Is Disoyamine safe for most people?
Disoyamine is considered safe for use in rinse-off cosmetics at typical concentrations. It may cause mild irritation in sensitive individuals, especially with prolonged contact. Avoid eye contact and discontinue use if irritation occurs.
Who should be careful with Disoyamine?
Individuals with very dry or compromised skin barriers Anyone with known sensitivity to amine oxides or soy derivatives
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.