| Literature DB >> 11853501 |
Mariken J T J Arts1, Guido R M M Haenen, Lonneke C Wilms, Sasja A J N Beetstra, Chantal G M Heijnen, Hans-Peter Voss, Aalt Bast.
Abstract
Flavonoids are potent antioxidants. It is also known that flavonoids bind to proteins. The effect of the interaction between tea flavonoids and proteins on the antioxidant capacity was examined. Their separate and combined antioxidant capacities were measured with the Trolox equivalent antioxidant capacity (TEAC) assay. It was observed that the antioxidant capacity of several components of green and black tea with alpha-, beta-, and kappa-casein or albumin is not additive; that is, a part of the total antioxidant capacity is masked by the interaction. This masking depends on both the protein and the flavonoid used. Components in green and black tea, which show the highest masking in combination with beta-casein, are epigallocatechin gallate and gallic acid. The results demonstrate that the matrix influences the efficacy of an antioxidant.Entities:
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Year: 2002 PMID： 11853501 DOI： 10.1021/jf010855a
Source DB: PubMed Journal: J Agric Food Chem ISSN： 0021-8561 Impact factor: 5.279