L-Tyrosine boosts cognitive performance under stress
evidence
The Claim
Many believe that L-Tyrosine can significantly enhance cognitive function, such as memory and attention, especially under stressful conditions like sleep deprivation or multitasking.
Origin
This myth likely arises from early studies and anecdotal reports, as well as marketing claims by supplement companies highlighting L-Tyrosine's role in neurotransmitter production.
What Science Says
Research, including several randomized controlled trials (RCTs), indicates that L-Tyrosine may help maintain cognitive performance under acute stress but does not necessarily enhance it beyond baseline levels. A meta-analysis suggests a small effect, primarily in situations involving extreme stressors. The effect sizes are typically modest, indicating it is not a universal cognitive enhancer.
Verdict
Partially True