When to take it
Morning or 30–60 minutes before a demanding task, on an empty stomach or with a light meal.
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Amino acidsWeak evidence
L-tyrosine
Also known as: tyrosine
Tyrosine is an amino acid the body uses to make dopamine, noradrenaline and thyroid hormones. It is studied mainly for sustaining mental performance under stress.
What it is used for
- Maintaining working memory and attention under acute stress, cold or sleep loss – weak to moderate evidence
- Improved focus without stress – weak evidence
Forms and how they differ
L-tyrosine
standard form in capsules and powder
N-acetyl-L-tyrosine (NALT)
more soluble but converts to tyrosine less efficiently
Pairs well with
Moderate caffeine, vitamin B6.
Do not combine / separate
Avoid in the evening; it may disturb sleep onset.
Watch out for
Caution with hyperthyroidism, thyroid medication, antidepressants (especially MAOIs), Parkinson's medication and migraine. Consult your doctor or pharmacist if you are pregnant, breastfeeding, have kidney or liver disease or take any medicines.
Safety
Do not exceed the label dose.
Practical tip
Keep tyrosine for unusually demanding days – there is no reason for daily use.
Products containing L-tyrosine 4
L-tyrosine free form 1000 mgfree form · 1 000 mg / serving
L-tyrosine 500 mgfree form · 500 mg / capsule
L-tyrosine 750 mg750 mg / capsule
L-tyrosine 350 mgN-acetyl-L-tyrosine · 350 mg / capsule
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence
Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.
Combination check
Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.
Check L-tyrosine with othersWhich supplements do you actually need?
Fénix Methode picks them from your blood results and schedules when to take what – no needless purchases.
From the same group
Acetyl-L-carnitineWeak evidenceAlmond proteinWeak evidenceAmino acid complexWeak evidenceBCAAWeak evidenceBeef proteinModerate evidenceCaseinStrong evidence
Important notice
This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.