Table 2: Further comparisons for black, oolong and green tea.
Black tea |
Oolong tea |
Green tea |
Theaflavins - reduced neural inflammation |
Oolong tea ethanol extract - reduced nitric oxide activity |
Restored hypothalamic-pituitary-adrenal activity |
Theaflavins - suppressed cytokine production |
Reduced interleukin activity |
Normalization of 5-HT serotonin tone |
Caffeine - reduced mind wandering |
|
Reduced glucocorticoids and adrenocorticotrophin hormone |
Caffeine - improved attention |
|
γ-aminobutyric acid associated with attenuation of stress. |
L-theanine - reduced stress and anxiety |
|
Epigallocatechin-3-gallate - increased alpha and beta brain waves. |
Black tea aroma - reduced Chromogranin-A levels after stress tasks |
|
Green tea extract - increased dorsolateral pre-frontal cortex activity |
|
|
Green tea aroma - reduced chromogranin-A levels after stress tasks |
References from Table 1 and Rothenberg, et al. [44].