13XP
May protect thinking under stress, cold or sleep loss; little effect when you are rested.
L-Tyrosine
A non-essential amino acid found in protein-rich foods like meat, dairy, and legumes
Often taken withCaffeine, Alpha-GPC, Rhodiola Rosea
Evidence-backed benefits
How L-Tyrosine can help, goal by goal, with the studies behind each score.
11XP
Little reliable effect on focus in rested adults.
How to read XP
Each score is for this supplement and that specific goal, not a general rating.
XP combines how reliable the research is with how much difference it usually makes. Higher means stronger evidence for that supplement and that goal.
Limited<15 XPModest15–27 XPModerate28–44 XPReliable45–69 XPHigh70+ XP
Dosage
What studies commonly use for L-Tyrosine, and how it is usually taken.
Usual dose
500–1,500 mg per day
500–1,500 mg/day (taken 30–60 min prior to acute stress)
How to take it
- Empty stomach
- 30–60 min before activity
See study range
500–2,000 mg/day (acute stress trials test 100–150 mg/kg, approx. 7–10 g)
Your journey
L-Tyrosine works within hours and does not build up, so what matters is when you use it. An estimate from the studies' timelines, not a promise: everyone responds differently.
From the first noticeable effect to roughly full strength. Colour follows the XP tier of each benefit.
Time it for when you need it
L-Tyrosine acts quickly and wears off, so there is nothing to build. Use it when the benefit matters.
Safety
What to know before you take L-Tyrosine.
Safety rating
Check first
Serious risks are possible.
- Dangerous with MAOI antidepressantsCan cause a sudden, serious spike in blood pressure.
- Restlessness and poor sleepTake it earlier in the day.
Check with a doctor first if you take thyroid or Parkinson's medicine, or have an overactive thyroid.
General information, not medical advice. If you are pregnant, take medication or have a health condition, check with a doctor or pharmacist first.
Common pairings
Supplements and habits often combined with L-Tyrosine.
Caffeine
Often combined for focus when tired
Alpha-GPC
Both used for focus under mental demand
Rhodiola Rosea
Commonly paired for stress and mental fatigue
Where to buy
Brands we looked at for L-Tyrosine, with our quality score for each.
Momentous
Tyrosine Capsules
Quality score4.5/5
No listings for this country yet.
Authority
Public figures who take or recommend L-Tyrosine. Portraits are AI-generated, not real photos, and this is not an endorsement.
Andrew Huberman
Neuroscientist
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