Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands - A review
Jongkees BJ, Hommel B, Kuhn S, Colzato LS
Published in Journal of Psychiatric Research
Key Findings
Tyrosine reliably improves cognitive performance in short-term demanding or stressful situations such as cold, noise and sleep loss, but does not enhance cognition at rest.
Conclusions
Benefit is restricted to states of catecholamine depletion.
Limitations
Small heterogeneous acute-dosing studies.
Supplements Studied
Tyrosine effectively enhances cognitive performance in short-term stressful and cognitively demanding situations, but does not improve cognition at rest.
Outcomes Measured
Tyrosine enhances cognitive performance in demanding or stressful situations but not at rest.
Tyrosine improved cognitive performance and effort-based responding under demanding conditions but had no effect in unstressed, rested participants
TYR does seem to effectively enhance cognitive performance, particularly in short-term stressful and/or cognitively demanding situations. We conclude that TYR is an effective enhancer of cognition, but only when neurotransmitter function is intact and DA and/or NE is temporarily depleted.
Related Health Concerns
Study Details
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This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.