Ingredient review
Myristamidopropyl Dimethylamine
INCI: MYRISTAMIDOPROPYL DIMETHYLAMINE
A gentle conditioning ingredient that helps hair feel soft and skin feel smooth without heavy buildup.
In plain English
Myristamidopropyl dimethylamine is a conditioning agent derived from myristic acid (a fatty acid found in coconut oil and other plant sources) and dimethylaminopropylamine. It works by depositing a thin, positively charged film on hair and skin, which neutralizes static, reduces frizz, and improves slip and softness. Unlike heavier silicones or waxes, it provides a lightweight feel that doesn't weigh down fine hair or clog pores. It's often used in rinse-off products like conditioners and body washes, but can also appear in leave-on formulations.
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
Myristamidopropyl Dimethylamine 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 Myristamidopropyl Dimethylamine.
- 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
A semi-synthetic conditioning molecule made from myristic acid (a fatty acid from coconut or palm oil) and a small amine group. It belongs to the class of amidoamine conditioning agents, known for their mildness and ability to improve wet and dry combing.
How it works
In a cosmetic product, myristamidopropyl dimethylamine carries a positive charge that attracts it to the negatively charged surface of hair or skin. This electrostatic bond creates a thin, even layer that reduces friction, smooths the cuticle, and helps prevent static electricity. The result is hair that feels softer, detangles more easily, and has less flyaway, and skin that feels smoother after rinsing.
Pros
Lightweight conditioning
Provides softness and slip without the heavy, greasy feel that some conditioners leave behind, making it ideal for fine or low-porosity hair.
Static control
Effectively reduces flyaways and static electricity, especially in dry or low-humidity environments, helping hair stay smooth and manageable.
Cons and cautions
Potential irritation at high levels
While generally mild, concentrations above 3% may cause slight stinging or redness on very sensitive or compromised skin, especially in leave-on products.
Not a deep repair ingredient
It coats the hair surface rather than penetrating the cortex, so it won't repair damaged hair bonds or provide deep protein restoration.
Best for
- People with fine or thin hair who want conditioning without weight
- Those looking for a gentle, non-silicone conditioning option
Use caution if
- Individuals with known sensitivity to amidoamine compounds (rare)
Usage tips
Safety summary
Myristamidopropyl dimethylamine is considered safe for cosmetic use at typical concentrations (0.5–3%). It has low irritation and sensitization potential in most people. As with any ingredient, patch testing is recommended for those with very sensitive skin or allergies.
Research notes
Research on amidoamine conditioning agents shows they effectively reduce combing force and static charge on hair. Studies indicate they are milder than quaternary ammonium compounds (quats) like cetrimonium chloride, with comparable conditioning benefits. No significant safety concerns have been identified in published literature.
Common label clues
- Typical concentration
- 0.5% to 3%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most major markets. The Cosmetic Ingredient Review (CIR) panel has evaluated similar amidoamines and found them safe for use in rinse-off and leave-on products at typical concentrations.
- Common uses
- Conditioners, Shampoos, Leave-in treatments, Body washes, Facial cleansers
- Environmental note
- Derived from plant-based fatty acids (coconut or palm), but the amine portion is synthetic. Palm sourcing may raise sustainability concerns; look for RSPO-certified palm derivatives if that matters to you.
Good to know
- This ingredient is often listed near the top of conditioner ingredient lists because it is used at moderate concentrations.
- It is compatible with both sulfate and sulfate-free shampoos.
Common questions
What is Myristamidopropyl Dimethylamine in beauty products?
Myristamidopropyl dimethylamine is a conditioning agent derived from myristic acid (a fatty acid found in coconut oil and other plant sources) and dimethylaminopropylamine. It works by depositing a thin, positively charged film on hair and skin, which neutralizes static, reduces frizz, and improves slip and softness. Unlike heavier silicones or waxes, it provides a lightweight feel that doesn't weigh down fine hair or clog pores. It's often used in rinse-off products like conditioners and body washes, but can also appear in leave-on formulations.
What does Myristamidopropyl Dimethylamine do in a beauty product?
In a cosmetic product, myristamidopropyl dimethylamine carries a positive charge that attracts it to the negatively charged surface of hair or skin. This electrostatic bond creates a thin, even layer that reduces friction, smooths the cuticle, and helps prevent static electricity. The result is hair that feels softer, detangles more easily, and has less flyaway, and skin that feels smoother after rinsing.
Is Myristamidopropyl Dimethylamine safe for most people?
Myristamidopropyl dimethylamine is considered safe for cosmetic use at typical concentrations (0.5–3%). It has low irritation and sensitization potential in most people. As with any ingredient, patch testing is recommended for those with very sensitive skin or allergies.
Who should be careful with Myristamidopropyl Dimethylamine?
Individuals with known sensitivity to amidoamine compounds (rare)
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.