Jun 15, 2026Longevity NutritionDoes L-Theanine Improve Sleep? What Human Trials ShowCan L-theanine improve sleep quality? The best human trials suggest a modest subjective benefit, but objective sleep results remain uncertain.l-theaninesleep qualitysystematic reviewmeta-analysisRead article →
Mar 9, 2026Mental HealthL-Theanine and Caffeine for Focus: What the Evidence ShowsL-theanine plus caffeine can improve attention and reaction time, especially under sleep loss. Here's what human trials support—and what they don't.l-theaninecaffeinesleep deprivationattentionRead article →