systematic_review
    2015
    High Quality

    Dopamine precursor tyrosine and cognitive motivation under demanding conditions: a systematic review

    Jongkees BJ, Hommel B, Kuhn S, Colzato LS

    Published in Journal of Psychiatric Research

    Methodology

    Systematic review of randomized trials of tyrosine supplementation on cognitive and motivational performance under stress or high cognitive load.

    Key Findings

    Tyrosine improved cognitive performance and effort-based responding under demanding conditions but had no effect in unstressed, rested participants.

    Conclusions

    Tyrosine supports motivation and effort only when catecholamine demand is elevated.

    Limitations

    Small trials; heterogeneous stressors and outcome measures.

    Supplements Studied

    L-Tyrosine
    Amino Acid

    Tyrosine improved cognitive performance and effort-based responding under demanding conditions

    Study Details

    Year:2015
    Duration:1 weeks
    Quality Score:7/10

    Access Study

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    This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.