Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Tyrosine is an amino acid that serves as a precursor for the synthesis of several important neurotransmitters, including dopamine, norepinephrine, and epinephrine. Scientific studies have investigated its role in supporting the "Specific Neurotransmitters" body system, particularly in situations of acute stress or cognitive demand. Research indicates that supplementing with tyrosine may help maintain cognitive performance, working memory, and alertness during exposure to stressors such as cold, sleep deprivation, or demanding cognitive tasks. This effect is thought to be due to tyrosine's ability to replenish neurotransmitter levels that can be depleted during stressful conditions. However, the evidence is mixed regarding its benefits under normal, non-stressed conditions, with most studies failing to demonstrate significant enhancement in cognitive or mood-related outcomes in healthy, unstressed individuals. Overall, while there is a moderate level of scientific validation for the use of tyrosine to support neurotransmitter function under specific stress-related situations, the evidence does not strongly support its use for general cognitive enhancement or mood support in everyday life. Reference: Jongkees et al., 2015, "The Influence of Tyrosine Supplementation on Cognitive Performance," Journal of Psychopharmacology.

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