L-Tyrosine improves mood and reduces depression
6.0Moderate
evidence
evidence
The Claim
It is often claimed that L-Tyrosine supplementation can improve mood and alleviate symptoms of depression by increasing the levels of dopamine and norepinephrine.
Origin
This belief stems from L-Tyrosine's role as a precursor to neurotransmitters involved in mood regulation, coupled with early studies suggesting potential mood benefits.
What Science Says
Current evidence from clinical trials and reviews shows mixed results, with some studies indicating minor mood improvements in specific populations (e.g., individuals with phenylketonuria) but not in the general population. Meta-analyses reveal that L-Tyrosine is not a substitute for antidepressants and does not consistently improve mood in those without specific metabolic needs.
Verdict
Mostly False
Sources
- PMID:38211744 Metabolomics on depression: A comparison of clinical and animal research.
- PMID:17389902 Mood is indirectly related to serotonin, norepinephrine and dopamine levels in humans: a meta-analysis of monoamine depletion studies.
- PMID:10050974 Analysis and metaanalysis of two polymorphisms within the tyrosine hydroxylase gene in bipolar and unipolar affective disorders.