L-Theanine With Suntheanine 150 mg
Backed by 26 studiesOverall grade based on research across 1 ingredient.
74out of 100Grade B
Research evidence score
Weighed against 26 published studies · led by L-Theanine
Ingredient breakdown
B
L-TheaninePromotes relaxation without drowsiness
Research direction: Leans supportiveEvidence: 26 studiesDose: 150 mgEvidence strength: Good - most research backs this
Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials (2025)A Randomized, Triple-Blind, Placebo-Controlled, Crossover Study to Investigate the Efficacy of a Single Dose of AlphaWave® l-Theanine on Stress in a Healthy Adult Population (2021)Effect of Alpha-S1-Casein Tryptic Hydrolysate and L-Theanine on Poor Sleep Quality: A Double Blind, Randomized Placebo-Controlled Crossover Trial (2022)
This summary describes only the ingredients and the research behind them — it is not a judgment of the product or its marketing. Grades reflect the weight of published evidence cross-referenced against 350M+ research papers. How we grade →
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