amino-acidEVIDENCEAUSOTC
L-Theanine
aka Theanine · Suntheanine
Unique amino acid found almost exclusively in tea leaves. Promotes calm, focused attention. Synergistic with caffeine.
Dose range100–400mg
Half-life1h
Onset30min
Safety5/5high evidence base
Mechanism of action
Crosses BBB and increases alpha brain wave activity (8-14 Hz). Increases GABA, serotonin, dopamine.
Benefits
Alpha brain wave activity / relaxed focus
EVIDENCEANobre 2008.
Anxiety reduction without sedation
EVIDENCEAKimura 2007.
Synergy with caffeine
EVIDENCEAOwen 2008.
Side effects
- Very few reportedraremild
Where to buy
Affiliate links| Vendor | Product | Size | Price | Per unit | |
|---|---|---|---|---|---|
| Nootropics DepotFeatured 4.8 | L-Theanine Capsules, 60ct (200mg) | 60 × 200mg | $14.99 | $0.25 | Buy |
| Pure Nootropics 4.5 | L-Theanine Capsules, 60ct (200mg) | 60 × 200mg | $14.99 | $0.25 | Buy |
| Double Wood Supplements 4.4 | L-Theanine Capsules, 120ct (200mg) | 120 × 200mg | $14.99 | $0.12 | Buy |