Stearoyl Inulin

Stearoyl Inulin is a modified polysaccharide created by attaching stearic acid (a fatty acid) to inulin, a naturally occurring carbohydrate derived from plant sources. This hybrid structure combines water-loving and oil-loving properties, making it a versatile functional ingredient in skincare formulations.In cosmetic products, it serves multiple roles: it conditions the skin surface, helps formulations remain stable and uniform (particularly in products containing high levels of other surfactants or minerals), and can act as a mild emulsifier to blend incompatible ingredients together.

Stearoyl Inulin works by anchoring itself into the structure of formulations—particularly within liposomal delivery systems (tiny spheres designed to carry active ingredients). The stearic acid tail attaches to the lipid layers, whilst the inulin portion faces outward, creating a protective coating that prevents the formula from destabilising when exposed to surfactants or minerals.This stabilising effect also benefits the skin: the ingredient deposits a light conditioning layer that can help the skin feel smoother and more comfortable, whilst supporting the delivery of other active ingredi…

Stearoyl Inulin is typically used at very low concentrations (well below 1%) as a functional additive rather than an active ingredient. There is no need for special application techniques; simply use the product as formulated. Its presence is designed to be invisible to you—supporting product stability and texture rather than requiring any particular usage pattern.

Stearoyl Inulin is generally well-tolerated and is used in minute quantities in cosmetic products. No significant safety concerns have been identified in skincare applications.