Myristyl Betaine

What is Myristyl Betaine?

Myristyl Betaine is an amphoteric surfactant, a zwitterionic compound featuring a myristyl alkyl chain attached to a betaine head group. Derived primarily from myristic acid sourced from coconut or palm kernel oils, it is produced through quaternization of myristyl dimethylamine with monochloroacetic acid or sodium chloroacetate. In cosmetic formulations, it appears in shampoos, facial cleansers, body washes, and hair conditioners. It works by reducing surface tension to emulsify oils and dirt, enabling effective removal while generating rich, stable lather. Its dual charge nature allows compatibility with anionic and cationic ingredients, maintaining mildness across pH ranges. Additionally, it deposits a conditioning film on hair and skin, enhancing slip, softness, and antistatic properties without residue buildup.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Abrasive
Provides gentle mechanical exfoliation and polishing, helping remove surface dead skin cells and improve smoothness and slip in scrubs and cleansers.
Antistatic agent
Reduces static electricity and flyaways by improving surface conductivity, enhancing hair manageability and smoothness in conditioners and styling products.
Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Cleansing agent
Removes dirt, oil, and impurities by lowering surface tension and forming micelles, enabling soils to be lifted and rinsed away from skin, hair, or teeth.
Foam booster
Enhances foam volume and creaminess and can stabilize lather, improving sensory feel and perceived cleansing in shampoos and wash-off products.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Gentle cleansing action removes impurities while preserving moisture balance.

Rich foam formation improves product texture and user experience.

Provides conditioning effects that smooth hair and soften skin.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with sensitive skin preferring non-irritating cleansers.
Persons with rare allergies to betaine surfactants.
People seeking sulfate-free shampoos with good lather.
Individuals sensitive to coconut-derived ingredients.
Those wanting improved hair manageability from daily washes.
Users of products with high surfactant blends if prone to dryness.

Safety Notes

  • Considered low hazard in cosmetic concentrations, suitable for rinse-off use.
  • Compatible in formulations for broad skin types with minimal sensitization risk.

Frequently Asked Questions about Myristyl Betaine

What is Myristyl Betaine derived from?

It comes from myristic acid in coconut or palm kernel oils, forming a mild zwitterionic surfactant.

Is it suitable for sensitive skin?

Yes, its amphoteric nature makes it gentle with low irritation potential in rinse-off products.

Does it help with hair conditioning?

It reduces static and friction, improving smoothness and manageability in shampoos.