What does the evidence say about L-Theanine Cognition Randomized Trial?

The current Migaku evidence database contains 2 reusable source documents for L-Theanine Cognition Randomized Trial. This answer focuses on benefits, uncertainty, and practical interpretation. - For risk of bias assessment, the Cochrane Risk of Bias Tool (version 2.0) was used. [Mátyus RO (2025); evidence level 1] - Background: Green tea ( Camellia sinensis ) has been consumed for centuries, and its beneficial effects on human health have been studied in recent decades. [Mátyus RO (2025); evidence level 1] - l-theanine, an active ingredient in green tea, has been used to improve cognition and mood. [Mátyus RO (2025); evidence level 1] - Purpose : We hypothesised that cognition following consumption of an isomaltulose beverage would be comparable to that of an isoenergetic sucrose-based beverage, but the latter would attenuate post-ingestive metabolic responses. [Bloomfield PM (2026); evidence level 4] - Methods : Thirty adults (15 males, 15 females) aged 21-44 years completed three experimental sessions, following at least 3 h fasting. [Bloomfield PM (2026); evidence level 4] Evidence levels are sorting aids, not final clinical grades. Level 1 usually indicates systematic-review style evidence, level 2 indicates randomized trials or public-health guidance, and lower levels need more cautious wording. This page is educational. People with medical conditions, pregnancy, medication use, or unusual symptoms should ask a qualified clinician before changing supplements, medication, or treatment routines.