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tannins

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tannins,
n.pl polyphenolic phytochemicals whose name derives from their use in tanning animal skins. Used as astringents, antioxidants, and styptics; treats burns, relieves diarrhea.

tannins
secondary plant metabolites, probably important in anti-herbivore defense; divisible into the common condensed tannins, and less common and more toxic hydrolyzable tannins, e.g. gallotannins in oak trees, punicalagin in Terminalia oblongata, capable of damaging the kidneys; condensed tannins bind to protein, interfere with the availability of proteins from feeds, and are pooly absorbed from the gut.


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