Document Detail


Addition of whole, semiskimmed, and skimmed bovine milk reduces the total antioxidant capacity of black tea.
MedLine Citation:
PMID:  20116655     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Epidemiological studies have shown that populations consuming fruits, vegetables, tea, cocoa, and red wine have lower incidences of cardiovascular disease, certain cancers, and eye disease. These health effects have largely been attributed to the polyphenol content of the foods and drinks studied. Black tea is rich in a range of polyphenolic compounds that could potentially have health-promoting properties. The scale of consumption of tea in the United Kingdom means that it could be an appropriate vehicle for increasing the antioxidant activity and polyphenol content of human plasma. However, it is common practice in the United Kingdom to add milk to tea, and some studies have suggested that this may decrease the overall antioxidant capacity. The objective of the present study was to analyze and compare the antioxidant capacity of 5 brands of tea and to test the hypothesis that the addition of different volumes of whole milk, semiskimmed, and skimmed milk may affect the antioxidant capacity. Each of the teas analyzed was a significant source of antioxidants. The addition of 10, 15, and 20 mL of whole, semiskimmed, and skimmed bovine milk to a 200-mL tea infusion decreased the total antioxidant capacity of all the brands of tea. Skimmed milk decreased the total antioxidant capacity of the tea infusion significantly (P < .05) more than either whole milk or semiskimmed milk. We conclude that black tea is a valuable source of antioxidants and that the effect of milk on the total antioxidant capacity may be related to the fat content of the milk.
Authors:
Lisa Ryan; S?bastien Petit
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Nutrition research (New York, N.Y.)     Volume:  30     ISSN:  1879-0739     ISO Abbreviation:  Nutr Res     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-02-01     Completed Date:  2010-04-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8303331     Medline TA:  Nutr Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  14-20     Citation Subset:  IM    
Copyright Information:
2010 Elsevier Inc. All rights reserved.
Affiliation:
Functional Food Center, School of Life Sciences, Oxford Brookes University, Oxford, United Kingdom. lisaryan@brookes.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Animals
Antioxidants / metabolism*
Camellia sinensis / chemistry*
Cattle
Dietary Fats / pharmacology*
Flavonoids / metabolism
Great Britain
Humans
Milk* / chemistry
Phenols / metabolism*
Tea / chemistry*
Chemical
Reg. No./Substance:
0/Antioxidants; 0/Dietary Fats; 0/Flavonoids; 0/Phenols; 0/Tea; 0/polyphenols

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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