Beta-sitosterol (from plant sterols)

Beta-sitosterol. Phytosterols (PS) are fats present in plants–mostly in plant oils, nuts and seeds. Because the human body cannot produce PS, they must be obtained through the diet. Epidemiologic studies suggest that phytosterol intake supports good health 1. Processing of plant oils typically reduces their PS content 1. The average consumption of PS in industrialized Western countries is low, about 78 mg/day. Asian countries consume an average of 4 times that amount, about 400 mg/day 2.

This ingredient can be found in the following products in United States:


  1. Awad AB, Fink CS. Phytosterols as anticancer dietary components: evidence and mechanism of action. J Nutr 2000;130:2127-30.
  2. Ovesna Z, Vachalkova A, Horvathova K. Taraxasterol and beta-sitosterol: new naturally compounds with chemoprotective/chemopreventive effects. Neoplasma 2004;51:407-14.