amino-acidEVIDENCEAUSOTC
L-Tyrosine
aka Tyrosine · NALT (N-Acetyl-L-Tyrosine)
Amino acid precursor to dopamine, norepinephrine, and epinephrine. Effective for cognitive performance under stress.
Dose range500–2000mg
Half-life2h
Onset60min
Safety5/5high evidence base
Mechanism of action
Rate-limited precursor in catecholamine synthesis. Replenishes brain stores under acute stress.
Benefits
Cognitive performance under acute stress
EVIDENCEADeijen & Orlebeke 1994.
Working memory during multitasking
EVIDENCEBThomas 1999 military study.
Focus during sleep deprivation
EVIDENCEBNeri 1995.
Side effects
- Headache (high doses)raremild
Where to buy
Affiliate links| Vendor | Product | Size | Price | Per unit | |
|---|---|---|---|---|---|
| Pure Nootropics 4.5 | L-Tyrosine Capsules, 60ct (500mg) | 60 × 500mg | $14.99 | $0.25 | Buy |
| Double Wood Supplements 4.4 | L-Tyrosine, 150ct (500mg) | 150 × 500mg | $14.99 | $0.10 | Buy |