What it is
Beta-Sitosterol is a phytosterol structurally related to cholesterol and widely distributed in plant oils and seeds. In formulations it conditions and softens the skin and helps support the structure and stability of oil-in-water emulsions. Because sterols are part of the skin's own lipid matrix, it is valued in barrier-supporting and moisturizing products, including sunscreens.
Safety & warnings
Beta-Sitosterol is generally well tolerated and is not a recognized fragrance allergen. As a skin-identical-type lipid it is used at low levels and is not considered a notable comedogenicity concern.
Origin & sourcing
Natural, a phytosterol obtained from plant sources such as vegetable oils, soybeans, and other seeds.
Questions everyone asks
What does beta-sitosterol do in skincare?
It is a plant sterol that conditions and softens skin and helps keep emulsions stable, supporting the skin's lipid barrier.
Where does it come from?
It is a phytosterol sourced from plants such as vegetable oils and soybeans.