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1. any of a group of closely related plant sterols, designated by Greek letters according to distinguishing characteristics.
2. a preparation of β-sitosterol and certain saturated sterols, used to treat hypercholesterolemia.
A plant-derived chemical similar to cholesterol, commonly found in wheat germ, soybeans, and corn oil.
sitosterol/si·tos·ter·ol/ (si-tos´ter-ol) any of a group of closely related plant sterols, having anticholesterolemic activity.
sitosterol(sī-tŏs′tə-rôl′, -rōl′, sĭ-)
Any of a group of sterols that occur in high concentrations in certain plants and are used in the synthesis of steroid hormones.
Etymology: Gk, sitos, food, stereos, solid; Ar, alkohl, essence
a mixture of sterols derived from plants, such as wheat germ, used for treating hyperbetalipoproteinemia and hypercholesterolemia that are unresponsive to other dietary measures. Its use is controversial, for a dispersing action in the mixture tends to cause loose bowel movements and may lead to diarrhea or interfere with the absorption of concomitantly administered medications. Use in pregnancy is not recommended.