Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Matcha, a finely ground powder of specially grown and processed green tea leaves, is traditionally consumed in Japan and has gained popularity worldwide for its purported cognitive benefits, including improved concentration. The scientific rationale for using matcha to support concentration centers on its unique combination of caffeine and L-theanine. Caffeine is a well-known stimulant that can enhance alertness and attention. L-theanine, an amino acid abundant in matcha, promotes relaxation without drowsiness and is thought to counterbalance the overstimulation sometimes caused by caffeine.

Several clinical studies have investigated the synergistic effects of caffeine and L-theanine on cognitive performance. Research shows that this combination can improve attention, reaction time, and working memory, likely due to L-theanine’s ability to increase alpha brain wave activity, which is associated with a relaxed yet alert mental state. A 2017 systematic review published in Nutrients found that the combination is associated with improved focus and cognitive performance compared to caffeine alone. Another study published in Biological Psychology (2010) reported that L-theanine and caffeine in combination improved accuracy and alertness during attention-switching tasks.

While more research is necessary to fully elucidate the optimal dosages and long-term effects, current scientific evidence supports the use of matcha for enhancing concentration, largely due to its natural blend of caffeine and L-theanine.

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