Ingredient review

Myristamidopropylamine Oxide

INCI: MYRISTAMIDOPROPYLAMINE OXIDE

A mild, effective surfactant that helps create rich foam and improve product texture without stripping the skin.

beautyskincaresurfactant

In plain English

This ingredient is a gentle cleansing agent that helps your face wash or shampoo lather up nicely. It's made from myristic acid (a fatty acid found in coconut oil) and is designed to clean without being harsh or drying. Think of it as a helper that makes your cleanser feel creamy and foamy while being kind to your 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

Myristamidopropylamine 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 Myristamidopropylamine 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

Myristamidopropylamine oxide is a semi-synthetic surfactant, meaning it's created by chemically modifying a natural fatty acid (myristic acid) to improve its cleansing and foaming properties. It belongs to the amine oxide family, known for being mild and compatible with other cleansing ingredients.

How it works

In a cosmetic product, this ingredient works by reducing the surface tension between water and oil, allowing dirt and excess oil to be rinsed away. It also stabilizes foam, making the lather feel richer and more luxurious. Because it's a non-ionic surfactant, it's less likely to irritate sensitive skin compared to stronger anionic surfactants like sodium lauryl sulfate.

Pros

Gentle on skin

This surfactant is much milder than traditional sulfates, making it suitable for daily use and for those with sensitive or dry skin.

Improves product feel

It helps create a creamy, stable foam that feels luxurious and spreads easily, enhancing the overall cleansing experience.

Cons and cautions

Limited cleansing power alone

On its own, it may not effectively remove heavy makeup or waterproof sunscreen, so it's often paired with other surfactants.

Potential for mild irritation

While generally low-risk, some individuals with very sensitive skin may experience slight irritation if used at high concentrations.

Best for

  • People with normal to dry skin looking for a mild cleanser
  • Anyone who prefers sulfate-free or gentle cleansing formulas

Use caution if

  • Individuals with known allergies to amine oxides (rare)
  • Those seeking a deep-cleansing, high-foam experience without additional surfactants

Usage tips

Use in rinse-off products like cleansers and shampoos for best results
Pair with other mild surfactants like cocamidopropyl betaine for a balanced formula
Avoid leave-on products unless specifically formulated for low irritation

Safety summary

Myristamidopropylamine oxide is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it a good choice for gentle cleansers. Rare allergic reactions are possible but uncommon.

Research notes

Studies on amine oxide surfactants indicate they are mild and effective foam boosters. While not as extensively studied as some other surfactants, available data supports their safety and efficacy in rinse-off products.

Common label clues

Typical concentration
1–5% in rinse-off products
Regulatory status
Approved for use in cosmetics by the FDA and EU CosIng database. Generally recognized as safe when used as directed.
Common uses
Facial cleansers, Body washes, Shampoos, Shaving creams
Environmental note
Biodegradability is moderate; check product formulations for overall environmental impact. Sourcing of myristic acid may involve palm oil, so look for sustainably sourced options.

Good to know

  • Often listed as a foam booster in sulfate-free shampoos
  • Derived from myristic acid, which is commonly sourced from coconut or palm kernel oil

Common questions

What is Myristamidopropylamine Oxide in beauty products?

This ingredient is a gentle cleansing agent that helps your face wash or shampoo lather up nicely. It's made from myristic acid (a fatty acid found in coconut oil) and is designed to clean without being harsh or drying. Think of it as a helper that makes your cleanser feel creamy and foamy while being kind to your skin.

What does Myristamidopropylamine Oxide 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 oil to be rinsed away. It also stabilizes foam, making the lather feel richer and more luxurious. Because it's a non-ionic surfactant, it's less likely to irritate sensitive skin compared to stronger anionic surfactants like sodium lauryl sulfate.

Is Myristamidopropylamine Oxide safe for most people?

Myristamidopropylamine oxide is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it a good choice for gentle cleansers. Rare allergic reactions are possible but uncommon.

Who should be careful with Myristamidopropylamine Oxide?

Individuals with known allergies to amine oxides (rare) Those seeking a deep-cleansing, high-foam experience without additional surfactants

Research sources

CosIng Database - European CommissionOpenPubMed - Safety of Amine Oxides in CosmeticsOpenEnvironmental Working Group (EWG) - Ingredient SafetyOpen

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.