L-Theanine — Evidence-Based Benefits & Dosage Guide
supplement • Evidence Grade A
L-Theanine is a supplement approach with strong evidence supporting its benefits. It is generally considered Very safe. Found naturally in green tea.. It serves as a natural alternative to 3 injectable or research compounds that people commonly use.
Amino acid from green tea that promotes calm focus without drowsiness. Synergistic with caffeine.
At a Glance
Fast decision signals for readers comparing evidence, safety, and use cases.
Evidence Grade
Higher grades indicate more reliable human evidence supporting real-world use.
Research Footprint
This entry would benefit from deeper study aggregation.
Use Case Coverage
Shows where this supplement or habit is currently positioned in the database.
Recommended Dosage
A quick starting reference, not personalized medical advice.
Timing
Specific timing guidance has not been added yet.
Safety Snapshot
Future versions should break this into interactions, contraindications, and population-specific warnings.
Stack Coverage
This ingredient appears in dedicated stack pages readers can browse directly.
Where it fits best
Training contexts
Key Details
Mechanism
Increases alpha brain waves, modulates GABA and glutamate, increases dopamine and serotonin.
Recommended Dosage
100-200mg daily
Safety Profile
Very safe. Found naturally in green tea.
Evidence Grade
Included in These Protocols
See how L-Theanine fits into broader stacks, routines, and lower-risk replacement strategies.
Included in These Stacks
Jump from this single ingredient into fuller stack pages with supporting items and broader goal context.
Best Natural Focus Stack
A cleaner cognition stack built around gentle alertness, task-start support, and recovery instead of harsh stimulants or speculative nootropics.
Best Natural Stress Resilience Stack
A calmer adaptogen-and-recovery stack built around cortisol management, sleep support, and nervous-system stability instead of dependence-prone anxiolytics or experimental nootropics.
Natural Alternative To
L-Theanine can replace these research chemicals
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Health Goals
Protocols
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L-Theanine offers a proven, natural path to your health goals — no injections required.