“The aroma of roasted green tea has both physiological and psychological sedative effects … and suggest that these pyrazines play a role in producing these effects, with 2,3,5-trimethylpyrazine being the most important aromatic component. Furthermore, the findings suggest that roasted green tea aroma exerts a sedative effect on the autonomic nervous system by suppressing sympathetic nerve activity while increasing parasympathetic nerve activity (Sugimoto et al., 2025).”

“We measured the urinary 8-hydroxydeoxyguanosine (8-OHdG) level as the marker for oxidative stress and the serum antioxidant capacity caused by the inhalation of an aromatic volatile concentrate of green tea. The ratio of the urinary 8-OHdG levels in the green tea aroma group to the control group was decreased by 52% at 20 weeks of inhalation (Li et al., 2017).”

“EEG was recorded from 4 scalp positions … and activity was estimated for 4 frequency bands (alpha1, alpha2, beta1 and beta2). The results showed that the subjective rating about relaxed feeling increased and electroencephalographic activities changed after smelling green tea … suggesting that smelling green tea may have anti-stress effects (Murao et al., 2013).”