Tristearin

What is Tristearin?

Tristearin, also known as glyceryl tristearate, is a simple lipid molecule formed by esterifying glycerol with three stearic acid chains. Sourced primarily from vegetable oils like palm or soybean, it exists as a white, waxy solid with a melting point near body temperature. Commonly featured in lipsticks, balms, creams, and foundations, this ingredient contributes to product structure by solidifying mixtures at room temperature while liquefying on skin contact. It stabilizes emulsions, modifies flow for even application, and imparts a smooth, protective layer that aligns with skin's natural lipid barrier, aiding in even distribution of other components without heaviness.

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

Provides a soft, smooth feel by mimicking skin lipids.

Enhances formula thickness for better stability and spreadability.

Supports moisture retention through mild barrier effects.

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 needing conditioning.
Individuals sensitive to stearic acid derivatives.
Users of solid or creamy products like balms and lipsticks.
People preferring lightweight, lipid-free formulas.
Those seeking non-greasy texture in daily cosmetics.
Those with rare allergies to plant-derived glycerides.

Safety Notes

  • Considered low hazard with minimal irritation potential.
  • Non-comedogenic, suitable for acne-prone skin types.

Frequently Asked Questions about Tristearin

What is tristearin made from?

It's a triglyceride from stearic acid in vegetable oils like palm.

Is tristearin safe for sensitive skin?

Yes, it shows low irritation and hazard ratings.

Does tristearin cause breakouts?

No, it has a comedogenic rating of 0.