A fatty acid-type ingredient derived from plants. Beta-sitosterol occurs naturally in many fruits, vegetables, nuts, and seeds. It is similar to cholesterol, which occurs naturally in skin and is considered part of skin's intercellular matrix. Applied to skin, it is considered a good moisturizing and anti-inflammatory ingredient (Sources: Voprosy Pitaniia
, Volume 81, 2012, pages 84-88; Phytomedicine
, September 2012, pages 1,072-1,076; and , August 2012, pages 19-24.