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].