Biochemistry Term

L-Theanine

テアニン

A calming amino acid naturally abundant in shaded tea leaves that promotes alpha brain waves.

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Botanical & Ceremonial Context

L-Theanine crosses the blood-brain barrier and modulates dopamine, serotonin, and GABA neurotransmitters. When consumed alongside matcha’s caffeine, it buffers adrenaline spikes, producing 4 to 6 hours of relaxed alertness and sustained focus without jitters or midday fatigue.

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