Ingredient review

Sesamidopropylamine Oxide

INCI: SESAMIDOPROPYLAMINE OXIDE

A gentle, sesame-derived surfactant that boosts foam and improves the feel of cleansers without stripping the skin.

beautyskincaresurfactant

In plain English

Sesamidopropylamine oxide is a mild cleansing ingredient made from sesame oil. It helps create a rich, creamy lather in shampoos and body washes while being less harsh than traditional sulfates. It also helps thicken the product and makes it feel smoother on the skin. Because it's derived from a natural oil and is generally gentle, it's often used in formulations for sensitive or dry skin.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

Sesamidopropylamine Oxide 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Sesamidopropylamine Oxide.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A semi-synthetic surfactant created by reacting sesame oil fatty acids with an amine oxide group. It belongs to the amine oxide family, known for their mildness and foam-enhancing properties.

How it works

It reduces the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its amine oxide structure also helps stabilize foam and adjust the thickness of liquid cleansers.

Pros

Gentle on skin

Derived from sesame oil, this surfactant cleanses without stripping the skin's natural moisture barrier, making it suitable for daily use.

Improves product feel

It boosts foam and thickens the formula, giving shampoos and body washes a luxurious, creamy lather that many users prefer.

Cons and cautions

Limited research

Compared to more common surfactants, there is less published safety and efficacy data specifically for sesamidopropylamine oxide.

Potential allergen

Although rare, individuals with a sesame allergy may react to this ingredient; patch testing is advisable for sensitive users.

Best for

  • People with normal to dry skin looking for a mild cleanser
  • Anyone who prefers plant-derived ingredients in their hair and body washes

Use caution if

  • Those with known sesame allergy (rare, but possible)
  • Individuals seeking completely sulfate-free formulations (it is not a sulfate, but check full label)

Usage tips

Look for it in the middle to lower half of the ingredient list in rinse-off products
Pair with a moisturizing conditioner or body lotion if you have very dry skin
Avoid using it in leave-on products unless specifically formulated for that purpose

Safety summary

Sesamidopropylamine oxide is considered safe for use in rinse-off cosmetics at typical concentrations. It is generally non-irritating and non-sensitizing, though individuals with sesame allergy should exercise caution. The Cosmetic Ingredient Review (CIR) has not published a specific monograph for this ingredient, but related amine oxides are well-tolerated.

Research notes

While direct studies on sesamidopropylamine oxide are sparse, the broader class of amine oxide surfactants is well-documented for mildness and low irritation potential. Its sesame-derived origin adds a natural positioning, but no unique clinical benefits over other mild surfactants have been proven.

Common label clues

Typical concentration
1–5% in rinse-off formulations
Regulatory status
Approved for use in cosmetics in the EU, US, and many other regions. No specific restrictions beyond general cosmetic safety requirements.
Common uses
Shampoos, Body washes, Facial cleansers, Shaving creams
Environmental note
Derived from renewable sesame oil. Biodegradability data specific to this compound is limited, but amine oxides in general are considered moderately biodegradable.

Good to know

  • Amine oxides like this one are often used to replace or reduce harsher sulfates in 'gentle' formulas
  • It is not a sulfate, so it won't produce the same high foam as SLS, but it creates a softer, creamier lather

Common questions

What is Sesamidopropylamine Oxide in beauty products?

Sesamidopropylamine oxide is a mild cleansing ingredient made from sesame oil. It helps create a rich, creamy lather in shampoos and body washes while being less harsh than traditional sulfates. It also helps thicken the product and makes it feel smoother on the skin. Because it's derived from a natural oil and is generally gentle, it's often used in formulations for sensitive or dry skin.

What does Sesamidopropylamine Oxide do in a beauty product?

It reduces the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its amine oxide structure also helps stabilize foam and adjust the thickness of liquid cleansers.

Is Sesamidopropylamine Oxide safe for most people?

Sesamidopropylamine oxide is considered safe for use in rinse-off cosmetics at typical concentrations. It is generally non-irritating and non-sensitizing, though individuals with sesame allergy should exercise caution. The Cosmetic Ingredient Review (CIR) has not published a specific monograph for this ingredient, but related amine oxides are well-tolerated.

Who should be careful with Sesamidopropylamine Oxide?

Those with known sesame allergy (rare, but possible) Individuals seeking completely sulfate-free formulations (it is not a sulfate, but check full label)

Research sources

Cosmetic Ingredient Review – Amine Oxides SafetyOpenPubMed – Surfactant mildness comparisonOpenEuropean Chemicals Agency – Amine oxidesOpen

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.