Source Naturals Phytosterol Complex with Beta-Sitosterol is a patented formula that features a collection of sterols derived from soybean hulls. Phytosterols are naturally found in many vegetables and grains and are known for their ability to support cholesterol wellness. Contains no yeast, dairy, egg, gluten, corn, wheat, sugar, starch, salt, preservatives, or artificial colors, flavors or fragrance.