Ray Sahelian, M.D. Comprehensive Phytosterols Complex Doctor Formulated Dietary Supplement Formulated by Medical Doctor Ray Sahelian, M.D.  Bestselling Author and Nutrition Expert. Phytosterols are natural components of many vegetables and grains. The three main phytosterols in this phytosterol complex are beta-sitosterol, campesterol and stigmasterol.Advance Physician Formulas, Inc.