Drinking Matcha tea can reduce anxiety. Using the 'elevated plus maze' test with mice, researchers have shown that Matcha green tea can reduce anxiety. Their experiments revealed that Matcha's anxiolytic effects are due to the activation of dopamine D1 receptors and certain serotonin receptors. The researchers suggest that adding a little Matcha tea to your diet may improve your health. Source 7g.
I heard about this tea before and the positive effects it can have. I really want to try it for myself and see though.