What it is
This ingredient is a triester of glycerin with long-chain (C18 to C36) fatty acids, giving a waxy material that adds body and structure to formulas. It is often used to thicken the oil phase, support emulsion stability, and impart a smooth, cushioned skin feel. In sunscreens and balms it can help structure the product and improve spreadability.
Safety & warnings
This is a high-molecular-weight, largely inert lipid that is generally well tolerated in leave-on products and is not associated with significant irritation or sensitization. Because it is a heavy, waxy ester, very acne-prone users may prefer to monitor how richer textures containing it suit their skin, though it is not a recognized strong comedogen.
Origin & sourcing
Synthetic; manufactured by esterifying glycerin with a blend of long-chain fatty acids.
Questions everyone asks
Why is C18-36 Acid Triglyceride used in balms and sunscreens?
Its waxy, structuring nature thickens the oil phase, stabilizes emulsions, and gives a smooth, cushioned feel.
Is it the same as a plant oil triglyceride?
No. It is a synthetic triglyceride built from long-chain fatty acids, making it firmer and more wax-like than common liquid plant-oil triglycerides.