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L-Theanine for Focus: What 14 Trials Actually Show
Dr Sarah Mitchell PhD Nutritional Neuroscience · University of Reading · 10+ years reviewing supplement evidence Last updated: 9 August 2026 L-theanine for focus is ...
L-Theanine and Caffeine Stack: What Clinical Doses Actually Work in 2026
Reviewed by Alex Carter Health and nutrition writer specialising in evidence-based nootropics. Alex has spent four years reviewing cognitive supplement research for Noobru's ed...