Safety · Supplement
L-Theanine: side effects, safety & interactions
Very safe and non-sedating; no meaningful toxicity or dependence.
- Overall grade
- Grade B
- Last revised
- 0
- graded outcomes
- 0
- references listed
Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.
The evidence in words
Safety profile
Very safe and non-sedating; no meaningful toxicity or dependence.
Interactions to respect
No major interactions are on record for L-Theanine at typical doses, but tell your clinician about everything you take.
What L-Theanine is
L-theanine is an amino acid found almost uniquely in tea. Alone it promotes a relaxed-but-alert state; its best-known use is smoothing caffeine.
The honest bottom line
The evidence-backed way to civilize caffeine: 200 mg theanine with your 100 mg caffeine for cleaner focus. Also a gentle standalone de-stressor.
Related reading
Entries that share this one's tags or conditions.
- Apigenin: side effects, safety & interactionsBenign at these doses; theoretical mild CYP interactions at high intakes.Evidence grade C
- GABA (Supplement): side effects, safety & interactionsGenerally safe; additive with other sedatives.Evidence grade D
- L-TheanineThe calm in green tea — pairs with caffeine to keep the focus and drop the jitter.Evidence grade B
- L-Theanine for Acute stress / anxietyEvidence grade B — Non-sedating calmEvidence grade B
Sources
This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.
Last revised . A grade is this entry's reading of the evidence, not medical advice.