Evidence supporting the use of: L-tyrosine
For the health condition: Athletic and Exercise Aids

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

L-tyrosine is an amino acid that serves as a precursor to important neurotransmitters such as dopamine, norepinephrine, and epinephrine. Its use as an athletic and exercise aid is primarily based on its role in supporting cognitive function and stress response during physically demanding activities. Scientific research has explored whether L-tyrosine supplementation can improve exercise performance, especially under conditions of stress (such as heat or prolonged exercise), by mitigating declines in cognitive performance and reducing perceived exertion.

A number of studies have investigated L-tyrosine's effects on mental performance and stress resilience rather than direct enhancements in physical strength or endurance. Some evidence suggests that L-tyrosine may help maintain cognitive function and mood in athletes exposed to acute stressors, such as military personnel or endurance athletes training in hot environments. For example, supplementation has been shown to attenuate decrements in cognitive performance during prolonged exercise or exposure to extreme conditions. However, the direct impact of L-tyrosine on physical athletic performance (e.g., strength, speed, endurance) in healthy individuals is not well supported.

Overall, the use of L-tyrosine as an exercise aid is scientifically plausible for supporting cognitive resilience under stress, but its effects on physical athletic performance are less clear and not strongly supported by robust clinical evidence. Thus, its evidence rating for use as an athletic and exercise aid is moderate, meriting a 2 out of 5.

More about l-tyrosine
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Other ingredients used for Athletic and Exercise Aids

7-Keto-DHEA
acetyl l-carnitine
adenosine 5-triphosphate disodium (ATP)
alpha d-ribofuranose
alpha-ketoglutarate (AKG)
amino acids
ashwagandha
astaxanthin
bacillus subtilis
beet
beta-alanine
black tea
bovine
branched-chain amino acids
caffeine
capsaicinoids
coenzyme Q10 (CoQ10)
collagen
colostrum
conjugated linoleic acid (CLA)
cordyceps
creatine monohydrate
curcumin
eleuthero
ginseng
green tea
guarana
guayusa
l-isoleucine
l-alanine
l-alanyl-l-glutamine
l-arginine
l-carnitine
l-citrulline
l-glutamine
l-glycine
l-leucine
l-ornithine
l-taurine
l-tyrosine
l-valine
maca
magnesium
maltodextrin
muira puama
Acetyl-L-Tyrosine
omega-3 fatty acids
ornithine alpha-ketoglutarate
peppermint oil
protein
pyridoxal-5-phosphate (P-5-P)
rhodiola
black ginger
spirulina
tongkat ali
tribulus
vitamin C
watermelon
whey protein
suma
jiaogulan
capsicum
bee pollen
cistanche
electrolytes blend (proprietary)
yerba mate
algae
cocoa
brown rice protein
sea salt
1,3,7-Trimethylpurine-2,6-dione
2, 17a-dimethyl-17b-hydroxy-5a-androst-2-ene
Arginine Alpha Ketoglutarate
Antler
Arginine Creatine
Arginine nitrate
Arachidonic Acid
Arginine malate
Arginine aspartate
Alpha glyceryl
Alpha-ketoisocaproic acid
Agmatine
adenosine triphosphate (ATP)
Algal protein
Alpha hydroxyisocaproic acid
Arginine silicate
Bicarbonate
Beef Protein
Bovine Protein
Bulbine natalensis
Ba Ji Tian
BCAA
Camellia sinensis
Coconut
Casein
Cardarine
Capsinoids
Citrate malate
Capsiate
Creatine
D-Aspartic Acid
Dihydrocapsiate
Deer Velvet
D-Ribose
Ephedra
Elk antler
Ecdysteroids
Elthyl-Alpha-Guanido-Methyl-Ethanoate
Ecdysterone
Ephedrine
glucose
Isoleucine
Ketone Salts
Milk Protein
Quinoa Protein
salt
yohimbine

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