Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Matcha, a powdered form of specially grown green tea, has been traditionally consumed for centuries in Japan, primarily for its calming and focusing effects. However, its use for mood swings specifically is more recent and largely rooted in emerging scientific research. Matcha contains L-theanine, an amino acid known to promote relaxation and reduce stress by increasing alpha brain wave activity. Clinical studies on L-theanine (often at doses found in matcha) suggest it may improve mood and reduce symptoms of anxiety and depression, though the direct impact on “mood swings”—rapid or extreme changes in mood—has not been extensively studied.

Caffeine, also present in matcha, can enhance alertness and mood, but excessive intake may worsen anxiety or mood instability in sensitive individuals. Some small studies and animal models indicate that green tea compounds, including catechins and L-theanine, may modulate neurotransmitters involved in mood regulation, such as dopamine and serotonin. However, robust clinical trials specifically examining matcha’s effect on mood swings are lacking.

In summary, there is some preliminary scientific evidence to support the use of matcha (or its key constituents) for promoting a balanced mood and possibly reducing anxiety, but its effectiveness for treating or supporting mood swings specifically is not well-established. The evidence is promising, but more targeted research is needed to justify its use for this particular condition.

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