Trimyristin

What is Trimyristin?

Trimyristin, also known as glyceryl trimyristate, is a triglyceride composed of glycerol esterified with three myristic acid molecules, often derived from vegetable oils like palm or coconut. In cosmetics, it appears as a white, waxy solid that melts at skin temperature, making it ideal for anhydrous products such as lip balms, sticks, and creams. It functions primarily by providing emolliency through a thin occlusive layer that smooths skin texture and minimizes water loss. As a viscosity controller, it thickens formulations for better spreadability and stability. Its solvent properties help dissolve lipophilic ingredients, while refatting action restores skin lipids post-cleansing, enhancing overall mildness in rinse-off items.

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:

Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Refatting
Replenishes lipids removed during cleansing to improve mildness and reduce tightness, leaving skin or hair feeling less stripped after rinse-off use.
Solvent
Dissolves and carries other ingredients, helping control viscosity, evaporation rate, and delivery of actives in both water- and oil-based systems.

Benefits

Softens and smooths skin by mimicking natural lipids and filling surface irregularities.

Improves product texture by adjusting thickness for even application and stability.

Replenishes skin lipids after cleansing to reduce dryness and tightness.

Who It's For

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

Who May Benefit Who Should Avoid
People with dry or rough skin seeking emollient hydration.
Those with rare allergies to myristic acid derivatives.
Individuals preferring thick, stable formulations like balms or sticks.
People sensitive to palm or coconut oil sources.
Users of rinse-off cleansers wanting less stripping effect.
Individuals avoiding waxy textures in lightweight products.

Safety Notes

  • Rated low hazard by major cosmetic safety databases.
  • Non-comedogenic with no pore-clogging concerns.

Frequently Asked Questions about Trimyristin

What is trimyristin made from?

It's a glycerol ester of myristic acid, typically from plant oils.

Is trimyristin safe for sensitive skin?

Yes, it shows low irritation potential in cosmetic use.

Does it help with dry skin?

It softens skin and replenishes lipids for improved comfort.