L-Theanine

Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial

Hidese S, et al. (2019) · Nutrients · n=30

L-Theanine reduces psychological and physiological stress responses

Kimura K, et al. (2007) · Biol Psychol · n=12

The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis.

Bulman A (2025) · Sleep medicine reviews · n=897

Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

Payne ER (2025) · Nutrition reviews

Effects of chamomile and -theanine beverage on menstrual pain, menstrual symptoms, mood, and sleep quality in young women experiencing primary dysmenorrhea: A randomized, double-blind, placebo-controlled study.

Soh Z (2025) · Journal of food and drug analysis · n=15

Minimal Influence of Formulated Nutritional Interventions on Sleep and Next-Morning Physical Performance, Cognitive Function, and Postural Sway in Adult Males: A Randomized, Placebo-Controlled, Crossover Study.

Morrison M (2025) · International journal of sport nutrition and exercise metabolism

Performance-enhancing effects of caffeine and L-Theanine among Iranian elite wrestlers: a focus on cognitive and specific physical performance.

Razazan R (2025) · Journal of the International Society of Sports Nutrition

High-dose L-theanine-caffeine combination improves neurobehavioural and neurophysiological measures of selective attention in acutely sleep-deprived young adults: a double-blind, placebo-controlled crossover study.

Nawarathna GS (2025) · The British journal of nutrition