The caffeine in tea leaves forms a unique "synergistic effect" with theanine, which can both refresh and soothe, avoiding the anxiety caused by caffeine alone:

1.Moderately refreshing and enhancing focus
Caffeine can block the action of adenosine (a substance that causes fatigue in the brain), stimulate the central nervous system, help relieve fatigue, and improve attention. It is suitable for drinking during work and study (recommended to drink in the morning or afternoon, avoid drinking within 4 hours before bedtime to avoid affecting sleep).
2.Relieve emotions and alleviate mild stress
Theanine can promote the secretion of gamma aminobutyric acid (GABA) in the brain - a neurotransmitter that inhibits nerve excitement, can alleviate tension and anxiety, and keep people calm while refreshing themselves (which is also why drinking tea is less likely to cause "palpitations" than drinking coffee).