10/30/2026
𝐏𝐀𝐘 𝐀𝐓𝐓𝐄𝐍𝐓𝐈𝐎𝐍! 𝐋-𝐓𝐇𝐄𝐀𝐍𝐈𝐍𝐄 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩...
New research suggests that L-theanine can benefit cognition by helping attention and that it can help depression.
L-theanine is an amino acid found almost exclusively in green tea. It improves calm by increasing alpha brain waves, which leads to relaxation and better focus.
That ability of L-theanine has been shown to help improve sleep. New research shows that it can also help improve concentration.
The meta-analysis of 31 controlled studies, which included 1168 people, compared L-theanine to placebo. It found that a single 200mg dose improves choice reaction time, suggesting that it enhances attention.
A single dose also appeared to significantly reduce depression.
L-theanine was safe.
This study suggests that taking a single dose of L-theanine offers short term benefit for attention and depression.
Mol Psychiatry. 2026 Nov;31(11):6592-6602.