Addition of Milk Does Not Alter the Antioxidant Activity of Black Tea
- 1 June 2005
- journal article
- Published by S. Karger AG in Annals of Nutrition and Metabolism
- Vol. 49 (3), 189-195
- https://doi.org/10.1159/000087071
Abstract
Tea is a polyphenol-rich beverage like wine and catechins are its chief polyphenols. Catechins have cardio-protective effects as they can scavenge free radicals and inhibit lipid peroxidation. Epidemiological studies indicate an inverse relation between tea consumption and the risk of cardiovascular and other chronic diseases. Addition of milk to black tea has been reported to adversely affect its beneficial effects, but the data are not unequivocal. Therefore, we assessed the effect of the addition of milk to black tea on its ability to modulate oxidative stress and antioxidant status in adult male human volunteers. Although the area under the curve of plasma catechins was lower on the consumption of tea with milk compared to black tea, it did not affect the beneficial effects of black tea on total plasma antioxidant activity, plasma resistance to oxidation induced ex vivo, and decreased plasma and urinary thiobarbituric acid reactive substance levels. The results suggest that addition of milk may not obviate the ability of black tea to modulate the antioxidant status of subjects and that consumption of black tea with/without milk prevents oxidative damage in vivo.Keywords
This publication has 49 references indexed in Scilit:
- Bioavailability of catechins from tea: the effect of milkEuropean Journal of Clinical Nutrition, 1998
- Analysis of catechins from green and black tea in humans: a specific and sensitive colorimetric assay of total catechins in biological fluidsInternational Journal of Food Sciences and Nutrition, 1997
- Tea ChemistryCritical Reviews in Plant Sciences, 1997
- Dietary flavonoids, antioxidant vitamins, and incidence of stroke: the Zutphen studyArchives of Internal Medicine, 1996
- Effects of Postharvest Dips in Calcium Chloride on StrawberryJournal of Agricultural and Food Chemistry, 1996
- Antioxidant Activity of Various Tea Extracts in Relation to Their AntimutagenicityJournal of Agricultural and Food Chemistry, 1995
- Inhibition of oxidation of human low-density lipoprotein by phenolic substances in red wineThe Lancet, 1993
- Green tea consumption and serum lipid profiles: A cross-sectional study in Northern Kyushu, JapanPreventive Medicine, 1992
- Tea consumption. Relationship to cholesterol, blood pressure, and coronary and total mortalityPreventive Medicine, 1992