期刊
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
卷 53, 期 1, 页码 182-187出版社
WILEY
DOI: 10.1111/ijfs.13572
关键词
Antioxidant; Camellia sinensis; polyphenols; steeping
资金
- Lovely Professional University
After water, tea is considered to be one of the most consumed drinks worldwide. To get the maximum benefit from the whole-leaf teas, the manufacturers provide instruction that these teas can be steeped 2-3 times over 6-8h. In this study, the effect of consecutive steeping on radical-scavenging ability of whole leaf green tea (unfermented), oolong tea (partially fermented) and black tea (fully fermented) was determined. Green tea showed the highest level of antioxidant activity, total phenolic and flavonoid content followed by oolong tea and black tea irrespective of the number of steeping done. The result also demonstrated that re-steeping reduced the antioxidant potential of teas. Moreover, it was revealed that green tea is the best candidate for re-steeping followed by oolong and then black tea.
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