The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Flavonoids and Other Polyphenols in Consumer Brews of Tea and Other Caffeinated Beverages
Abstract
The polyphenolic, flavonoid, and caffeine compositions of four commercial tea bag products (typical of those used in the UK, US, continental Europe, and the Middle East) and beverages prepared from them under a range of typical consumer use conditions have been studied. Leaf composition was determined by extraction with aqueous methanol: the absolute compositions of all four products were remarkably similar in terms of most phenolic compounds. The flavonoids comprised the major proportion (93-94%) of the total phenolics estimated by the Folin-Ciocalteu method. At brew times up to 2 min the composition of the brew solids was for each product practically independent of brew time, with flavonoids again comprising the major proportion (86-88%) of the total phenolics. The efficiency of extraction in brewing of total phenolics, total flavonoids, catechins, and theaflavins was up to 35-55% of the total available in the leaf, whereas the flavonol and flavone glycosides and caffeine were more efficiently extracted (up to 55-90%). The contribution of tea to the UK adult average total dietary intake of flavonols and flavones was calculated to be up to 80% depending on brewing conditions.
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Citations
Cites
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Concentrations of Proanthocyanidins in Common Foods and Estimations of Normal Consumption
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Effect of tea phenolics and their aromatic fecal bacterial metabolites on intestinal microbiota
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Microwave-assisted extraction of tea phenols: A phenomenological study
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Metadata
- Authors
- Lakenbrink, C., Lapczynski, S., Maiwald, B., & Engelhardt, U. H.
- Venue
- Journal of Agricultural and Food Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2000-06-23
- Volume
- 48
- Issue
- 7
- Pages
- 2848-2852
- ISSN
- 0021-8561 (ISSN-L)
- 1520-5118
- OpenAlex
- W2064552149
- Cited by
- 286
- References
- 1
- FWCI
- 4.16
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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