Amino acids
L-tyrosine
Also called: tyrosine, N-acetyl tyrosine
An amino acid used to make dopamine, adrenaline and thyroid hormone.
- Why people take it
- Focus under stress, mood.
- What the evidence says
- Some evidence for thinking under stress, sleep loss or cold.
- How it is usually taken
- Usually 500 mg to 2 g a day, taken before stressful or demanding tasks in studies.
- Be careful
- Avoid with MAO-inhibitor antidepressants, hyperthyroidism or melanoma.
- Medicines it can interact with
- Can raise blood pressure with MAOI antidepressants; may affect levothyroxine and levodopa.
Other amino acids
Common questions
What is L-tyrosine?
An amino acid used to make dopamine, adrenaline and thyroid hormone.
Why do people take L-tyrosine?
Focus under stress, mood.
Does L-tyrosine work?
Some evidence for thinking under stress, sleep loss or cold.
How much L-tyrosine do people take?
Usually 500 mg to 2 g a day, taken before stressful or demanding tasks in studies.
Is L-tyrosine safe?
Avoid with MAO-inhibitor antidepressants, hyperthyroidism or melanoma.
Does L-tyrosine interact with medicines?
Can raise blood pressure with MAOI antidepressants; may affect levothyroxine and levodopa.
Sources and further reading
Last reviewed 31 October 2026. Written by Satya Babu.
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