L-Theanine
emerging l-theanine — rising in focus stacks; evidence still early
⚠ Safety in context
- minorwith Caffeine: Commonly paired; L-theanine is said to smooth caffeine’s jitter. Low-stakes.
Evidence by outcome
stressgrade Clow certainty— small calming effect; often paired with caffeine to smooth its edge
cognitiongrade Cmoderate certainty— improves attention and reduces distraction, especially combined with caffeine
sleepgrade Clow certainty— may improve subjective sleep quality via relaxation rather than sedation
People say · Evidence shows
“L-theanine + caffeine is the perfect focus stack”
aheadlargemechanistic speculation
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sources: PMID:00000022 · PMID:20000107 · PMID:42180808