Rate My SPF

Stearoyl Inulin

What Stearoyl Inulin is & what it does

Stearoyl Inulin is an ester of stearic acid and inulin, a plant-derived polysaccharide often sourced from chicory root. It functions as an emulsifier and surface-modifying agent, helping to stabilize blends of oil and water and to coat pigments or UV filters for a smoother, more uniform texture. Its plant-sugar backbone makes it a common choice in formulas aiming for a softer, natural-feeling finish.

What does Stearoyl Inulin do in skincare?

Stearoyl Inulin acts as an emulsifier and surface-modifying agent. It helps keep oil and water phases blended and can coat pigments or UV filters so they spread more smoothly and evenly. The result is often a softer, more uniform texture.

Is Stearoyl Inulin natural or synthetic?

Stearoyl Inulin is plant-derived but chemically processed, so it is best described as naturally derived rather than purely natural. It is made by joining inulin, a sugar from plants such as chicory root, with stearic acid. This combination creates an ingredient that performs reliably in cosmetic formulas.

Is Stearoyl Inulin vegan?

Stearoyl Inulin is typically vegan, since inulin comes from plants and stearic acid used in cosmetics is often plant- or synthetically sourced. Because stearic acid can in some cases come from animal fats, anyone seeking a strictly vegan product should look for vegan certification or check with the manufacturer.

Sunscreens with Stearoyl Inulin

We rate 11 sunscreens that contain it, showing the top 10 by overall score:

← All ingredients