03 Jun 2026 Kate Street (Clinical Nutritionist) Prioritising focus and cognition with L-theanine 03 Jun 2026 Share Share on LinkedIn Share on Facebook Share on Twitter Share on Google+ Share on Pinterest Written by Kate Street, Clinical Nutritionist and Communications and Content Coordinator at Blackmores Institute Articles Key highlights Emerging evidence suggests L-theanine may support calm, focused cognition by increasing alpha brain wave activity and modulating glutamatergic and GABAergic neurotransmission, helping to reduce cognitive 'noise' and support attentional control. Clinical studies indicate benefits for stress-related outcomes, selective attention, task performance, and cognitive function, particularly during periods of psychological stress or increased mental demand. Rapid oral absorption and onset of action support the use of L-theanine in flexible, situational supplementation formats for cognitively demanding settings. × To continue reading this article, please Log In or Sign Up for access.