Focus
L-Tyrosine
L-Tyrosine is an amino acid that may help cognition mainly during stress, sleep loss, or heavy mental load.
How it counts: Counts toward the grade
One of the core ingredients the Dose score (and so the grade) is built on. A product earns credit for it up to the clinical dose.
- Clinical dose
- 1,000–2,000 mg
- Safety ceiling
- —
- Evidence
- moderate
- Category
- Focus
Evidence summary
Research confidence: medium
Review of 22 studies found tyrosine preserves cognitive performance specifically under acute stress/cognitive-load conditions (sleep deprivation, cold, multitasking) but not in non-stressed states; commonly effective doses used in trials ranged ~500 mg-2 g (some lab RCTs instead dosed by bodyweight, 100-150 mg/kg). Reference raised to 1 g (2026-10-02): ATHLEAN-X's pre-workout guide cites 1-2 g (1.5 g sweet spot); 500 mg sits at the bottom of the trial range.
Research sources
Dosed at or above clinical in
- Gorilla Mind Gorilla Mode5,000 mg
- Gorilla Mind Gorilla Mode Base Pre-Workout3,000 mg
- KAGED Pre-Workout Elite2,500 mg
- Raw Nutrition Essential Pre-Workout2,000 mg
- Alpha Lion SUPERHUMAN Extreme2,000 mg
- Raw Nutrition Thavage Pre-Workout2,000 mg
- Ghost Lifestyle LEGEND V4 Pre-Workout2,000 mg
- Bucked Up Mother Bucker1,500 mg
- JYM Supplement Science Pre JYM High-Performance Pre-Workout1,500 mg
- Transparent Labs STIM-FREE Pre-Workout1,000 mg
- Cellucor C4 Ultimate Pre-Workout1,000 mg
- Alpha Lion SUPERHUMAN Burn1,000 mg
- BodyTech Solid Pre1,000 mg
- Transparent Labs BULK Pre-Workout1,000 mg