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β-sitosterol, a prototypical phytosterol. Phytosterols are phytosteroids, similar to cholesterol, that serve as structural components of biological membranes of plants. [1] They encompass plant sterols and stanols. [1] More than 250 sterols and related compounds have been identified. [2] Free phytosterols extracted from oils are insoluble in ...
Molar mass. 248.410 g·mol −1. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references. Sterol is an organic compound [1] with formula C. 17H. 28O, whose molecule is derived from that of gonane by replacement of a hydrogen atom on C3 position by a hydroxyl group.
β-sitosterol is widely distributed in the plant kingdom.It is found in vegetable oil, nuts, avocados, and derived prepared foods such as salad dressings. [2] Olavius algarvensis, a species of marine annelid, predominantly incorporate sitosterol into their cell membranes instead of cholesterol, though cholesterol is also present in said membranes.
Plant sterols are cholesterol-like molecules found in all plant foods, with the highest concentrations occurring in vegetable oils. Plant sterols are plant equivalents of cholesterol and have a very similar molecular structure. According to their structure, they can be divided into sterols and stanols, stanols being a saturated subgroup of sterols.
Plant sterols were first shown in the 1950s to lower LDLs and cholesterol. [7] Since then, numerous studies have reported the lipid-lowering effects of dietary phytosterols, including campesterol. [8] In basic research, campesterol competes with cholesterol, thus reducing the absorption of cholesterol in the human intestine. [9]
Stigmasterol – a plant sterol (phytosterol) – is among the most abundant of plant sterols, having a major function to maintain the structure and physiology of cell membranes. [2] In the European Union, it is a food additive listed with E number E499, and may be used in food manufacturing to increase the phytosterol content, potentially ...