Evidence supporting the use of: L-tyrosine
For the health condition: Stress

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Synopsis

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

L-tyrosine is an amino acid that serves as a precursor to the neurotransmitters dopamine, norepinephrine, and epinephrine, all of which play key roles in the body’s response to stress. Scientific studies have investigated the effects of L-tyrosine supplementation on cognitive performance and stress resilience, particularly in situations involving acute physical or psychological stress (such as cold exposure, sleep deprivation, or military training).

Several controlled trials have found that L-tyrosine can help mitigate declines in cognitive performance and mood during stressful conditions. For example, research involving military personnel and sleep-deprived individuals has shown that tyrosine supplementation (usually in doses of 100-150 mg/kg) can improve working memory, alertness, and cognitive flexibility under stress. These effects are thought to be due to tyrosine’s role in replenishing neurotransmitter stores that may become depleted during periods of prolonged stress.

However, while there is moderate scientific support for the use of L-tyrosine in acute stress situations, evidence is less robust for chronic stress or general stress management in healthy individuals. Most studies are short-term and involve specific, high-stress environments. Overall, the scientific evidence is rated as moderate (3 out of 5), supporting its use for acute stress resilience rather than as a general stress-relief supplement.

More about l-tyrosine
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Other ingredients used for Stress

5-Hydroxytryptophan (5-HTP)
7,8-Dihydroxyflavone
7-Keto-DHEA
Acetyl L-carnitine
Acetyl-L-Tyrosine
Agarwood
Agastache
Agmatine
Agrimony
Akebia
Albizia
Algal protein
Alpha lactalbumin
alpha-pinene
AMP-activated protein kinase (AMPK)
anemarrhena asphodeloides
anise
Anserina
antler
Antrodia camphorata
apigenin
Aralia
Arginine aspartate
arjun tree
arjuna
ashitaba
ashwagandha
asparagus
astragalus
baccosides
Bacopa
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bacoside
baicalein
baicalin
Baikal Skullcap
banana
banyan
Basidiomycota
bee pollen
benegut perilla (proprietary)
bergamot
betony
Bifidobacteria
Bifidobacterium bifidum
Bifidobacterium lactis
Bifidobacterium longum
biota seed
bird\'s nest
black ginger
Black spruce
black tea
bonito peptide
borage
brahmi
Buddha\'s hand
Bupleurum
bupleurum falcatum
C-phycocyanin
calamus
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Capitate Valerian
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caterpillar mushroom
catnip
catuaba
Celastrus
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chamomile
cherimoya
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chocolate
chuchuhuasi
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cocoa
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curcumin
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devil\'s club
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dismutase
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dodeca-2E, 4E-dienoic acid isobutylamide
dong quai root
eleuthero
emblicanin
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kudzu
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l-tyrosine
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Products containing l-tyrosine

Douglas Laboratories 5-HTP Plus Formula
Thorne Amino Complex Berry
Thorne Amino Complex Lemon
Pure Encapsulations Amino-NR
Pure Encapsulations Amino Replete
Metagenics BioPure Protein® Powder
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Berry
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Vanilla
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Berry
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Chai
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Vanilla
Pure Encapsulations Cognitive Aminos
Designs For Health CraveArrest™
Pure Encapsulations DopaPlus
Pure Encapsulations Electrolyte/Energy Formula
Pure Encapsulations Emotional Wellness
Pure Encapsulations Emotional Wellness
Douglas Laboratories Free Form Amino
Pure Encapsulations Iodine and Tyrosine
Klean Athlete Klean Isolate ™
Pure Encapsulations l-Tyrosine
Designs For Health L-Tyrosine
Designs For Health Neurolink™
Metagenics Perfect Protein® Pea & Rice Chocolate Powder
Metagenics Perfect Protein Pea & Rice Vanilla Powder
Metagenics Perfect Protein Whey Chocolate
Metagenics Perfect Protein Whey Vanilla
Vitabase Super Fat Burner
Thorne Thyrocsin
Pure Encapsulations Thyroid Support Complex
Metagenics Ultra Glucose Control® Chocolate
Metagenics Ultra Glucose Control Chocolate
Metagenics Ultra Glucose Control Vanilla
Metagenics Ultra Glucose Control Vanilla
Metagenics UltraClear RENEW Detox Powder Berry
Metagenics UltraClear RENEW Detox Powder Chai
Metagenics UltraClear RENEW Detox Powder Vanilla
Metagenics UltraGI Replenish® Chocolate
Metagenics UltraGI Replenish Chocolate
Metagenics UltraGI Replenish Vanilla
Metagenics UltraGI Replenish Vanilla
Metagenics UltraInflamX Plus 360°® Chocolate/Orange
Metagenics UltraInflamX Plus 360° Mango
Metagenics UltraInflamX Plus 360° Mango
Metagenics UltraInflamX Plus 360° Orange
Metagenics UltraInflamX Plus 360° Original Spice
Metagenics UltraInflamX Plus 360° Pineapple/Banana
Metagenics UltraInflamX Plus 360° Pineapple/Banana
Metagenics UltraMeal Advanced Protein® Dutch Chocolate
Metagenics UltraMeal Advanced Protein French Vanilla
Metagenics UltraMeal Advanced Protein Plain
Metagenics UltraMeal Cardio 360°® Pea/Rice Chocolate
Metagenics UltraMeal Cardio 360° Pea/Rice Vanilla