Ltheanine

L-theanine is an amino acid found primarily in tea leaves, particularly in green tea. It is also present in some mushrooms. It is known for its ability to cross the blood-brain barrier, influencing brain activity. L-theanine is often associated with promoting relaxation and reducing stress without causing drowsiness. This effect is thought to be mediated by its influence on neurotransmitters such as gamma-aminobutyric acid (GABA), serotonin, and dopamine. Additionally, L-theanine has been studied for its potential to improve cognitive function, including attention and focus. It is available as a dietary supplement and is sometimes combined with caffeine, which may enhance alertness and focus. The human body does not produce L-theanine, so it must be obtained through diet or supplementation. While generally considered safe, some individuals may experience mild side effects.