Taxonomic group: plant / Streptophyta
(Phylum: Streptophyta)
NCBI PubMed ID: 10917926Publication DOI: 10.1093/jn/130.8.2073SJournal NLM ID: 0404243Publisher: Rockville, MD: American Society for Nutrition
Institutions: Institute of Food Research, Norwich Research Park, Colney, UK, Laboratoire des Maladies Métaboliques et Micronutriments, INRA, Saint-Genès-Champanelle, France
The main dietary sources of polyphenols are reviewed, and the daily intake is calculated for a given diet containing some common fruits, vegetables and beverages. Phenolic acids account for about one third of the total intake and flavonoids account for the remaining two thirds. The most abundant flavonoids in the diet are flavanols (catechins plus proanthocyanidins), anthocyanins and their oxidation products. The main polyphenol dietary sources are fruit and beverages (fruit juice, wine, tea, coffee, chocolate and beer) and, to a lesser extent vegetables, dry legumes and cereals. The total intake is ∼1 g/d. Large uncertainties remain due to the lack of comprehensive data on the content of some of the main polyphenol classes in food. Bioavailability studies in humans are discussed. The maximum concentration in plasma rarely exceeds 1 μM after the consumption of 10–100 mg of a single phenolic compound. However, the total plasma phenol concentration is probably higher due to the presence of metabolites formed in the body's tissues or by the colonic microflora. These metabolites are still largely unknown and not accounted for. Both chemical and biochemical factors that affect the absorption and metabolism of polyphenols are reviewed, with particular emphasis on flavonoid glycosides. A better understanding of these factors is essential to explain the large variations in bioavailability observed among polyphenols and among individuals.
metabolism, flavonoid, Antioxidant, bioavailability, glucosidase, flavonoid glycoside, dietary intake, polyphenol, phenolic acid, gut absorption, colonic microflora
Structure type: monomer
Location inside paper: p. 2079S, Table 3
Trivial name: isoquercitrin
Compound class: saponin glycoside, glycoside, flavonoid glycoside, flavonol glycoside, flavone glycoside
Contained glycoepitopes: IEDB_142488,IEDB_146664,IEDB_983931,SB_192
Related record ID(s): 67762, 67763, 67764, 67765, 67767, 67768, 67769, 67770
NCBI Taxonomy refs (TaxIDs): 33090Reference(s) to other database(s): CCSD:
49965, CBank-STR:953
Show glycosyltransferases
There is only one chemically distinct structure:
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