of tea mentioned abovewere significantly different (p b 0.05). Generally,
the processing methods for production of the three types of teawere
different. Green tea is an unfermented tea (degree of fermentation is 0),
which is particularly rich in polyphenol compounds. Nevertheless,
white tea and oolong tea are partially fermented teas, their degrees of
fermentation are about 20–30% and 30–60% respectively; the polyphenolic
compounds contained in them were partially oxidized during fermentation
(Harbowy & Balentine, 1997; Hsiao, Chen, & Cheng, 2010)