L-Theanine is a non-essential amino acid primarily found in green tea leaves and certain mushrooms. It is known for promoting relaxation and reducing stress without causing drowsiness. Discovered in 1949 by Japanese scientists, L-theanine is similar to glutamate, which helps transmit nerve impulses in the brain. L-theanine can affect brain chemicals like serotonin, dopamine, and GABA, which play a role in regulating mood, emotion, alertness, concentration, and sleep.
L-Theanine is available in supplement form and is often used to enhance mental focus, improve sleep quality, reduce anxiety, and support overall cognitive health. It is considered generally safe for consumption, with recommended daily doses of 200-500mg for healthy adults. Some studies suggest benefits such as improved mental focus and cognition, better sleep, relaxation, and reduced blood pressure. Taiyo International produces Suntheanine, a patented form of pure L-Theanine. L-Theanine supplements are widely available from various manufacturers and retailers. Prices range from around $7 to $30 depending on quantity and brand.
