We studied the effects of an additive flavor on human physiological responses accompanied with normal tea ingestion. In this study, we prepared and used a newly devised cup that gives aroma while subjects are drinking tea. As a result, we observed higher relative power value of α waves[α p/(αp+βp)x100, p : power value] of EEG at Pz position when the subjects drink tea with an additive flavor than when normal tea. In addition, the records of HRV and skin blood flow showed that the additive flavor moderated the level of the increase in the hear rate and the activity of sympathetic nervous system accompanied with normal tea ingestion. These results suggest that the additive flavor enhanced the relaxation of normal tea ingestion.
