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L-Theanine
Amino acid from tea used for calm focus and stress support.
What It Does
L-theanine may promote a relaxed but alert state in some users.
Often paired with caffeine for focus with less jitteriness.
Who Needs It Most
| Demographic | Target Intake | Upper Limit |
|---|---|---|
| all, mental_health | 100-200 mg | No established UL |
Signs of Deficiency
- No deficiency state
Best Food Sources
Green tea
Natural source
Supplement Guide
Best forms: Pure L-theanine
What to look for: Single-ingredient product from tested brand
What to avoid: Combining with sedatives without guidance
Timing: Morning or evening depending on goal.
Who Should Avoid It
No major common contraindications in our database for this nutrient. Always check medication interactions.
The Research
PubMed citations are temporarily unavailable.
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