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 (pŏl′ē-fē′nôl′, -nōl′, -nŏl′)
Any of various alcohols containing two or more benzene rings that each have at least one hydroxyl group (OH) attached. Many polyphenols occur naturally in plants, and some kinds, such as the flavonoids and tannins, are believed to be beneficial to health.

pol′y·phe·no′lic (-fĭ-nō′lĭk, -nŏl′ĭk) adj.


(Chemistry) chem relating to a polyphenol
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P80, which contains a rare combination of five natural polyphenolic antioxidants -tannic acid, gallic acid, gamma-amino butyric acid, ellagic acid and corilagin, is extracted from high quality longan (commonly known as "dragon eye") fruit sourced from Northern Thailand.
A diet high in polyphenolic acids (or polyphenols, compounds in plants such as fruits, vegetables, nuts and beans) may have a positive impact on blood pressure, according to Italian researchers.
Green and herbal teas are a good source of polyphenolic compounds such as catechins, which act to increase the activity of pepsin, the digestive enzyme that aids the breakdown of dietary proteins in the stomach.
Characterizing grape polyphenolic extracts sourced from pomace is one approach to examining their antimicrobial potential.
9) In a different study that year, resveratrol, the primary active polyphenolic constituent in red wine, was assessed in terms of topical/transdermal delivery viability, given previously established benefits shown via systemic administration.
FLAVANOIDS: These are polyphenolic plant compounds that are rich in antioxidant and have antiinflammatory health benefits.
Pomegranate peel has been traditionally used as folk medicine owing to rich source of polyphenolic compounds.
The extract of Capsicum annuum was prepared by maceration method and the total polyphenolic and flavonoids contents were determined using a spectrophotometric method.
Polyphenolic compounds like Rosmarinic acid, Caffeic acid etc increses reducing activity of plant species of Lamiaceae.
Skin biopsies and skin polyphenolic antioxidant levels, determined by Raman spectroscopy, were obtained prior to and after the study period.
Purpose: This study was undertaken to determine the effect of propolis extracts from arid region of Argentina, on the activity/expression of pro-inflammatory enzymes, and as potential free radical scavenger, antifungal and anthelmintic agent as well as to get a first insight into the polyphenolic profile of the active fractions.
It ranks among the 10 most powerful vegetables due to its antioxidant capacity ascribed to the high polyphenolic and betalain contents.