StackTerminal.Health

BETA

L-Tyrosine

Catecholamine precursor (dopamine, norepinephrine) that may preserve cognitive performance under stress, sleep deprivation, or cold exposure.

focusstresscognitive
Evidence last reviewed: 04 Apr 2026
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Biomarkers studied
Outcomes directly measured across the evidence records below
Cognitive
Cognitive FunctionPerceived Stress
Evidence
2 records
Working memory under cold exposure
Healthy adults undergoing cold stressRCT
PUBMEDModerate

Tyrosine supplementation significantly mitigated cold-induced working memory deficits; proposed mechanism via maintenance of brain catecholamine levels during physiological stress.

Dose: 2000 mgDuration: Acute
Benefits appear specific to conditions of catecholamine depletion (stress, fatigue, cold).
Cognitive performance under stress / demanding conditions
Healthy adults under stress (cold, sleep loss, cognitive load)Rapid evidence assessment / systematic review
PUBMEDLow

Weak recommendation in favor of tyrosine for cognitive stress — all reviewed studies showed positive effects; benefits most evident under high environmental demands (cold, fatigue, workload), not at rest.

Dose: 2000 mgDuration: Acute
Tyrosine appears ineffective when catecholamine systems are not stressed; benefits are situational.
Forms
L-Tyrosine (free form)
NALT (N-acetyl L-tyrosine) has lower conversion efficiency; free form preferred.

Stacks containing L-Tyrosine

Public community stacks that include this ingredient.

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stresscognitivefocus

Combining L-Tyrosine with Eleuthero can reduce stress and support cognitive function. L-Tyrosine is known for its role in stress reduction and cognitive enhancement, while Eleuthero is an adaptogen that supports focus and endurance.

L-Tyrosine
500mg
Eleuthero (Siberian Ginseng)
400mg
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sleepfocus

Supports attention & cognitive resilience without stimulants.

L-Theanine
200mg
L-Tyrosine
1000mg
New
View