76
SCORE
Tyrosine (L-tyrosine)
Focus · Stress resilience · Cognition
Tier 2 — Promising
What it is
A building block for the brain chemicals dopamine and adrenaline. Military trials show it significantly preserves mental performance under acute stress, sleep deprivation, and cold exposure. Will not boost cognition under normal, rested conditions. Take 30 to 60 minutes before stressful situations. Very safe with no serious side effects.
Efficacy
3/5
Safety
5/5
Research
3/5
Onset
4/5
Cost
4/5
Drug-int.
5/5
Dose
500–2,000 mg 30–60 min before acute stress or demanding cognitive tasks
Time of day & tips
Take on an empty stomach 30–60 min before the demanding task. Avoid taking with protein-rich food — other amino acids compete for absorption. Not for daily use.
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