Published in Journal of Functional Foods, a study in mice showed that anxiety behavior in rodents was reduced after consuming Matcha powder or Matcha extract.
According to researchers, calming effects of tea are due to mechanisms that activate dopamine D1 receptors and serotonin 5-HT1A receptors, which are closely related to anxiety behavior.
"Although an additional epidemiological study is needed, the results of our study show that Matcha, which has been used as a medical agent for many years, can be very beneficial to the human body," said author Yuki Kurauchi of the Kumamoto University of Japan.
"We hope that our research on Matcha can lead to health benefits worldwide," added Kurauchi.
For this study, the researchers conducted an "increased labyrinth" test – an anxiety test for rodents – and found that anxiety in mice was reduced after consuming Matcha powder or Matcha extract.
Additionally, when the anxiolytic activity of the different Matcha extracts was assessed, a stronger effect was obtained with the extract derived using 80% ethanol in comparison with the extract obtained from hot water only.
Matcha is a finely chopped powder of new leaves (90 percent) of Camellia sinensis of green tea.