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Related to catechin: Epicatechin



phenols of vegetable origin. Characteristic representatives of catechins are the stereoisomers catechin and epicatechin.

Catechins are colorless crystalline substances, often with a bitter, astringent taste. They are easily soluble in water and alcohol. Tannins are formed upon their polymerization. Catechins have been found in a number of edible fruits (apples, peaches, apricots, quinces, plums, and cherries) and berries (strawberries, currants, raspberries, gooseberries, and red bilberries). A large amount is present in the young shoots of the tea plant (as much as 20–25 percent of the dry weight), in catechu acacias, in grapes (primarily in the pits and skin), and in cocoa beans. The compounds are extracted from tea leaves on an industrial scale.

Catechins are highly active biologically. They regulate capillary permeability, increase the elasticity of capillary walls, and promote more efficient use of ascorbic acid by the organism. Therefore, catechins are among the substances that have vita-min-P activity, and they are used in the treatment of diseases connected with functional disorders of the capillaries and of edemas of vascular origin. Tea catechins have antimicrobial properties and are used in the treatment of dysentery. Oxidative conversions of catechins play an important role in food production technology, including the fermentation of tea, wine-making, and the preparation of cocoa.


Zaprometov, M. N. Biokhimiia katekhinov. Moscow, 1964. Biokhimiia fenol’nykh soedinenii. Edited by G. Harborne. Moscow, 1968. (Translated from English.)


References in periodicals archive ?
The green tea proprietary formula contained green tea catechins and other ingredients (amounts not given; Internet search reveals xylitol, sorbitol, natural flavors, green tea [leaf], acacia gum, jaborandi extract (leaf), magnesium stearate, silicon dioxide, sucralose).
2013b), we demonstrated that catechin increases heme amounts which preferentially favor catalase (CAT) activities in rat heart blood mitochondria.
Because EGCG is the most potent of the four catechins found in tea, it not only provides wide ranging health benefits, but offers a huge range of possible applications.
Chemoprevention of human prostate cancer by oral administration of green tea catechins in volunteers with high-grade prostate intraepithelial neoplasia: a preliminary report from a one-year proof-of-principle study.
Results revealed that prevalent phenolic compounds in pistachio oil are di and tri catechin isomers and epicatechin, and coerestin was in the next place.
Another group of rats were supplemented with different antioxidants, catechin (50 mg/Kg) and quercetin (50 mg/Kg) after 4 weeks of alcohol administration till the end of the dosing period.
YH: I believe that there should only be the most effective and convenient and economical carriers for all tea catechin properties.
Meanwhile, demands for turmeric, mulberry leaves, astaxanthin, catechin, gamma-aminobutyric acid and peptide are expected to grow.
Polyphenol generally refers to a compound with more than two phenolic hydroxyl groups in the same molecule, and catechin is classified as a flavonoid.
Phyto Pharmacare will shortly begin validating the bioavailability of Phytofare (TM) Catechin Extract in human studies and is just completing in-vitro studies of its anti-malarial properties compared against other catechin extracts at St.
Green tea was found to activate intracellular antioxidants, inhibit precarcinogen formation and suppress angiogenesis and cancer cell proliferation in the gastrointestinal tract (Koo 2004); a major catechin present in green tea (epicatechin gallate) has been shown to stimulate cell apoptosis and inhibition of cell growth in various cells and to induce the activation of tumour suppressor proteins in human colorectal cancer cells (Cho 2007).
Gargling with tea catechin extracts for the prevention of influenza infection in elderly nursing home residents: a prospective clinical study," J Altern Complement Med, 2006.