L-Theanine Powder 20/98/99% (Tea Extract, ) là gì? Ứng dụng, liều dùng, sản phẩm thay thế & thông số

L-Theanine (CAS No.: 3081–61–6) is a naturally occurring non-protein amino acid, chemically known as N-ethyl-γ-glutamine, with molecular formula C7H14N2O3 and molecular weight 174.20. First isolated from Gyokuro green tea by Japanese researchers, L-Theanine is a characteristic amino acid of Camellia sinensis, accounting for approximately 60% to 70% of total free amino acids in tea leaves and 1% to 2% of dry tea weight. L-Theanine imparts the savory, sweet taste unique to tea and is an important indicator of tea quality. L-Theanine appears as white crystalline powder, odorless, with a slightly sweet distinctive taste, soluble in water, with a decomposition temperature of 214–215°C. L-Theanine can cross the blood-brain barrier and functions by modulating neurotransmitter levels including GABA, dopamine, and serotonin, promoting alpha brain wave activity to induce a state of "relaxed alertness" without causing drowsiness. Medical research has confirmed that L-Theanine effectively reduces stress and anxiety without causing drowsiness. Most people feel its effects within 30–60 minutes of consumption, with effects lasting 8 to 12 hours.

As a single chemical entity, L-Theanine's efficacy primarily stems from its precise regulation of neurotransmitter systems. Once ingested, L-Theanine crosses the blood-brain barrier and acts through the following mechanisms:

GABA Modulation: L-Theanine enhances GABA activity, promoting natural calm and relaxation.