Phytosterol


Also found in: Dictionary, Medical, Wikipedia.

phytosterol

[fī′täs·tə‚rȯl]
(biochemistry)
Any of various sterols obtained from plants, including ergosterol and stigmasterol.

Phytosterol

 

a plant sterol released from the unsaponified parts of plant lipides. In contrast to animal sterols, such as cholesterol, the side chain in phytosterols is unsaturated and contains not eight carbon atoms but nine or ten. Most phytosterols are optically active crystalline substances with physical and chemical properties similar to those of other sterols.

The most common phytosterols include (β-sitosterol (C29H50O) and stigmasterol (C29H48O), which are released by cotton-seed, soybean, and other oils and from the by-products of the sulfate process in the cellulose industry. Isomers of stigmasterol are α-spinasterol (from spinach), fucosterol (from fungi), brassicasterol (C28H46O; from cabbage), and campesterol (C28H48O; from cabbage). Ergosterol is also a phytosterol.

Phytosterols are found in plants in free form, as well as in compounds with carbohydrates or fatty acids or with both. In some plants, β-sitosterol, like cholesterol, serves as the precursor to progesterone. Stigmasterol serves as a vitamin for guinea pigs (antiankylosis factor). Phytosterols also include certain C28 and C29 sterols from ferns and conifers that induce molting in insects (ecdysones).

Phytosterols are used in the pharmaceutical industry for the synthesis of steroid preparations.

REFERENCES

Heftman, E. Biokhimiia steroidov. Moscow, 1972. (Translated from English.)
Heftmann, E. “Biochemistry of Plant Steroids.” Annual Review of Plant Physiology, 1963, vol. 14.
Bean, G. A. “Phytosterols.” Advances in Lipid Research, 1973, vol. 11.

E. P. SEREBRIAKOV

References in periodicals archive ?
This can be prevented through heart health ingredients including Omega-3, Soy Protein, Beta Glucan, Phytosterol and others.
M.Kohout , Characterization of the Molecular Species of Phytosterol Fatty Acyl Esters in Corn ,Advanced Research on Plant Lipids,p.
Phytoconstituents Result Alkaloid -ve Carbohydrate -ve Flavonoids +ve Triterpenoids +ve Steroids +ve Tannins +ve Phytosterol +ve Saponins +ve Table 2: Effect of pumpkin seed extract on ACF count expressed in number of ACF/5[cm.sup.2].
ORT and JLT had the highest level of unsaponifiables in tree-borne seed oils, which seemed to be proportional to the high tocopherol level (101.98 [+ or -] 1.34 mg/100 g oil; Table 2) and a high phytosterol content (479.45 [+ or -] 4.27 mg/100 g oil; Table 3) of JLT.
Summary of the Phytosterols Market Report can be accessed on the website at: https://www.alliedmarketresearch.com/phytosterols-market
Niki, "Antioxidant effects of phytosterol and its components," Journal of Nutritional Science and Vitaminology, vol.
africana in BPH treatment and attributed this to the synergistic effects of pentacyclic triterpenoids, ferulic esters of long-chain fatty alcohols, and phytosterols contained in P.
ABSTRACT Mussels are an excellent source of phytosterols, which have many health benefits including reduction of the level of cholesterol in the blood.
Cranberry seed oil, which is extracted from cranberry seeds and is the byproduct of cranberry juice processing, is a rich source of essential fatty acids, phytosterols and antioxidants.
A few major brands that contain phytosterol esters: Nature Made CholestOff Plus, Puritan's Pride Phytosterol Complex, and Now Foods Beta-Sitosterol Plant Sterols.
Moreover, Cran Bella's high phytosterol content may enhance the protection and repair of damaged tissue, soothe exposure-induced inflammation and reduce itchiness in irritated skin.
Graminex(R) markets its own line of dietary supplements, focusing on prostate care, menopausal support, skin care and antioxidant, amino acid and phytosterol maintenance, Partnered with its distributors, Graminex(R) products are sold in more than 44 countries on six continents.