L-Theanine
An amino acid from green tea that pairs calm with stable focus. Combined with caffeine, it reduces jitter while preserving alertness.
Typical dose
100–400mg per day
Timing
Morning (for focus) or evening (for relaxation)
Monthly cost (approx.)
~$7
Primary goals
recovery · health · performance
Scientific Evidence
Papers Forgestack cites for L-Theanine recommendations. Each link goes to PubMed or an official society source.
- ReviewTier 2
Hidese et al. 2019 · PubMed / Source
- RCTTier 2
Williams et al. 2020 · PubMed / Source
- RCTTier 2
Kimura et al. 2007 · PubMed / Source
Side Effects & Cautions
- rare
Drowsiness at high doses
- rare
Mild BP drop for those already prone to hypotension
Consult a physician or pharmacist if in doubt. Forgestack does not provide medical advice.
Interactions
BP medication
May slightly amplify BP-lowering effects.
Where to Buy
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Whether this supplement should be your top priority depends on your goal and current stack.