AOR L-Tyrosine 600mg - Focus & Cognitive Support | 180 Caps
Visit the AOR Store| Brand | AOR |
| Serving | 1 capsule (600 mg) |
| Licensed Natural Health Product | NPN 80003032 |
| Quality Standards | GMP-compliant facility |
| Country | Made in Canada  |
About this item
- PURE 600 MG L-TYROSINE PER CAPSULE: A single-ingredient amino-acid capsule - 600 mg of L-tyrosine per capsule, 180 vegan capsules per bottle, a 30-day supply at the full adult dose.
- HELPS IN THE MANAGEMENT OF STRESS: Research supports the ability of L-tyrosine to help in the management of stress of a physical or psychological origin, including lack of sleep and multitasking.
- A BUILDING BLOCK FOR KEY NEUROTRANSMITTERS: L-Tyrosine is a precursor amino acid your body uses to help produce the catecholamines dopamine and norepinephrine.
- CONVENIENT VEGAN CAPSULES: Easy-to-swallow vegan capsules (hypromellose shell) - no measuring, mixing or taste, so it is simple to fit into a busy daily routine.
- MINIMAL-INGREDIENT FORMULA: Just one non-medicinal ingredient (sodium stearyl fumarate) beyond the vegan capsule shell - vegan, non-GMO and gluten-free.
- A 30-DAY SUPPLY: 180 capsules per bottle - at the recommended adult dose of 6 capsules per day, one bottle lasts a full 30 days.
- PREMIUM CANADIAN QUALITY: Made in Canada in a GMP-compliant facility by Advanced Orthomolecular Research (AOR), licensed under Health Canada NPN 80003032.
- TRUSTED SINCE 1991: From AOR - three decades of science-based, evidence-informed formulations manufactured in Canada to high quality standards.
Product description
L-Tyrosine Capsules - Amino Acid Support for Stress, Focus and Cognitive Performance
Pure 600 mg L-tyrosine in an easy-to-swallow vegan capsule. Research supports the ability of L-tyrosine to help in the management of stress of a physical or psychological origin, including lack of sleep and multitasking. Licensed Natural Health Product NPN 80003032.
Pur, 600 mg de L-tyrosine dans une capsule végane facile à avaler. La recherche soutient la capacité de la L-tyrosine à aider à la gestion du stress d'origine physique ou psychologique, notamment le manque de sommeil et le multitâche. Produit de santé naturel homologué. NPN 80003032.
L-Tyrosine
Backed by science
L-tyrosine is the amino-acid precursor your body uses to help build the catecholamines dopamine and norepinephrine - neurotransmitters studied for roles in focus, alertness and the body's stress response.
The AOR difference
600 mg of pure L-tyrosine per capsule in a convenient vegan capsule - a minimal non-medicinal ingredient list, made in Canada to GMP standards.
What AOR L-Tyrosine Capsules Support
L-Tyrosine is the building block for key brain chemicals - here is what AOR L-Tyrosine Capsules are formulated to support.
Stress Management
Helps in the management of stress of a physical or psychological origin, including lack of sleep and multitasking.
Neurotransmitter Production
A precursor amino acid your body uses to help produce the catecholamines dopamine and norepinephrine.
Mental Alertness
L-tyrosine has been studied for a role in supporting mental alertness during periods of physical or mental demand.
Convenient Capsule Form
600 mg per capsule in an easy-to-swallow vegan capsule - no measuring or mixing required.
AOR L-Tyrosine: Supplement Facts
Supplement Facts
- L-Tyrosine per capsule600 mg
Non-Medicinal Ingredients: Non-medicinal ingredients: Sodium stearyl fumarate. Capsule: Hypromellose.
Recommended Use or Purpose: Research supports the use of L-Tyrosine to help in the management of stress of a physical or psychological origin, including lack of sleep and multitasking.
Recommended Dose (Adults 18 years and older): Take 6 capsules in the morning on an empty stomach, or as directed by a qualified health care practitioner. Do not crush, blend or mix capsules. Swallow capsules whole. Do not exceed the daily dose unless instructed by a health care practitioner.
Cautions and Warnings: Do not use if you are pregnant or breastfeeding, or if you have the genetic metabolic disorder phenylketonuria (PKU). When using this product, consult a health care practitioner if you are a person with hyperthyroidism, Graves' disease or active melanoma, or if you are taking dopamine, thyroid hormone medication and/or contraceptive medications, or other psychoactive medications. Discontinue use and consult a health care practitioner if you experience nausea, headache, fatigue, heartburn or joint pain. Supplemental L-tyrosine may increase blood pressure or lead to difficulty sleeping in some persons. Other Information: GMP manufacturing, independent testing. Do not use if the safety seal is broken. Store tightly sealed in a cool, dry place.
Actual product packaging and materials may contain more and different information than shown on our website. Always read labels, warnings and directions before using or consuming a product. This item is sold and shipped by Amazon.ca; purchases are completed on Amazon.
Fiche produit
- L-Tyrosine par capsule600 mg
Ingrédients non médicinaux : Ingrédients non médicinaux : Fumarate de stéaryle de sodium. Capsule : Hypromellose.
Usage ou fins recommandés : La recherche soutient la capacité de la L-Tyrosine à aider à la gestion du stress d'origine physique ou psychologique, notamment le manque de sommeil et le multitâche.
Dose recommandée (adultes de 18 ans et plus) : Prendre 6 capsules le matin à jeun, ou selon les recommandations d'un praticien de soins de santé qualifié. Ne pas écraser, mélanger ou mixer les capsules. Avaler les capsules entières. Ne pas dépasser la dose quotidienne, sauf indication contraire d'un praticien de la santé.
Mises en garde : Ne pas utiliser si vous êtes enceinte ou si vous allaitez, ou si vous souffrez d'un trouble métabolique génétique, la phénylcétonurie (PCU). Lorsque vous utilisez ce produit, consultez un professionnel de la santé si vous êtes une personne souffrant d'hyperthyroïdie, de maladie grave ou de mélanome actif, ou si vous prenez de la dopamine, des médicaments à base d'hormones thyroïdiennes et/ou des médicaments contraceptifs, ou d'autres médicaments psychoactifs. Arrêtez l'utilisation et consultez un professionnel de la santé si vous ressentez des nausées, des maux de tête, de la fatigue, des brûlures d'estomac ou des douleurs articulaires. Un supplément de L-tyrosine peut augmenter la tension artérielle ou entraîner des difficultés à dormir chez certaines personnes. Autres renseignements : fabrication BPF, testé en laboratoire indépendant. Ne pas utiliser si le sceau de sécurité est brisé. Conserver hermétiquement fermé dans un endroit frais et sec.
NPN 80003032
Support your stress response the easy way
Get AOR L-Tyrosine on Amazon.ca - fast, protected delivery.
Get it on Amazon.caWhy AOR L-Tyrosine
One pure amino acid in a convenient capsule - here is what it is formulated to support.
Stress Management
Helps in the management of stress of a physical or psychological origin, including lack of sleep and multitasking.
Neurotransmitter Support
A building block for the catecholamines dopamine and norepinephrine.
Focus & Alertness
Studied for a role in mental alertness during periods of physical or mental demand.
Convenient & Clean
600 mg per vegan capsule with a minimal ingredient list - simple to fit into a busy routine.
How to use
Take
Adults 18 years and older: take 6 capsules in the morning on an empty stomach, or as directed by a qualified health care practitioner.
Swallow whole
Do not crush, blend or mix capsules - swallow them whole with water.
Stay within the daily dose
Do not exceed the daily dose unless instructed by a qualified health care practitioner.
Ask a professional
Consult a qualified health care practitioner before use if you have hyperthyroidism, Graves' disease or active melanoma, or if you are taking dopamine, thyroid hormone medication, contraceptive medications or other psychoactive medications.
What the research says about L-tyrosine
Peer-reviewed studies and reviews on the amino acid L-tyrosine - shared for education, not as claims about this finished product. AOR L-Tyrosine Capsules' claim is the statement authorized under its Natural Health Product licence, NPN 80003032.
Fewer lapses after a night without sleep
In a 13-hour overnight vigilance and psychomotor battery following one night's sleep loss, a split 150 mg/kg dose of tyrosine reduced the usual performance decline and cut lapses on a high-event-rate vigilance task, with benefits lasting about three hours.
Human RCTImproved two stress-sensitive tasks under noise
Sixteen healthy adults performed cognitive tasks while exposed to 90 dB noise; 100 mg/kg tyrosine improved performance on the two tasks most sensitive to stress and modestly lowered diastolic blood pressure shortly after ingestion.
Human RCTSustained working memory during multitasking
Comparing a multiple-task battery (working memory, arithmetic, visual and auditory monitoring at once) against a simple-task battery, 150 mg/kg tyrosine improved accuracy and reduced list-retrieval errors on the working-memory component specifically under the multitasking condition.
Human RCTWorking memory held up during cold-water immersion
Nineteen volunteers underwent 90-minute cold-water immersions; cold exposure raised salivary cortisol and impaired match-to-sample memory and reaction time, while a 300 mg/kg split dose of tyrosine increased correct responses and sped information processing on the memory task.
Human RCTCognitive and marksmanship performance preserved while body core cooled
After cold-water immersion lowered core body temperature by about 1.6 degrees C, a 300 mg/kg tyrosine dose prevented the drop in match-to-sample memory (down 18% on placebo) and marksmanship (down 14% on placebo) seen without it.
Human RCTFewer adverse moods during combined cold-and-altitude stress
In a double-blind crossover trial, 100 mg/kg tyrosine reduced stress symptoms, adverse moods and performance impairments in volunteers exposed to 4.5 hours of cold plus low-oxygen conditions who showed an average-or-greater stress response.
Human RCTSustained brain norepinephrine release under heat stress
In rats, heat stress impaired coping behavior and memory while increasing hippocampal norepinephrine release; tyrosine (400 mg/kg) preserved coping behavior and sustained norepinephrine release, extending earlier cold-stress findings to a different stressor.
Animal studyPrefrontal dopamine neurons depend on tyrosine supply
This review of animal and human data concludes that dopamine neurons projecting to the prefrontal cortex - involved in working memory and stress response - are sensitive to brain tyrosine availability, with supplemental tyrosine most effective when these neurons are already highly active, as under stress.
ReviewHigher doses eased a cold-induced memory deficit in rats
Rats performing a delayed matching-to-sample task at 2 degrees C showed reduced accuracy versus 22 degrees C; doses of 100 and 200 mg/kg tyrosine significantly improved matching accuracy in the cold, though not completely back to warm-condition levels.
Animal studyTested head-to-head against caffeine, phentermine and amphetamine
Across a 40.5-hour sleep-deprivation protocol in 76 healthy men, tyrosine (150 mg/kg) was compared with caffeine, phentermine and D-amphetamine; unlike the other three, tyrosine had no measurable effect on sleep drive or recovery-sleep quality.
Human RCTA relatively benign option for sustained overnight work
Studying continuous overnight work with one night's sleep loss, the authors describe tyrosine as a relatively benign treatment at the tested dose that may help counteract performance decrements during sustained work coupled with sleep loss.
Human RCTOne of few supplements flagged for sleep-deprived personnel
This systematic review of 37 studies on dietary supplements and cognitive performance in healthy young adults found most evidence too weak to recommend, but suggested tyrosine or caffeine specifically for personnel who are sleep-deprived.
Systematic reviewMore tyrosine did not mean better memory in older adults
In a dose-ranging crossover trial (100, 150 or 200 mg/kg), older adults showed a dose-dependent rise in plasma tyrosine, and working-memory performance on a demanding task declined at higher doses - most in those with the largest plasma response.
Human RCTNo significant benefit found for endurance performance
A GRADE-rated systematic review and meta-analysis of 8 studies found moderate-quality evidence that tyrosine supplementation does not improve time-to-exhaustion or time-trial performance in physically active adults - a reminder that its studied benefits are cognitive, not athletic.
Meta-analysisNo disruption to sleep quality at the tested research dose
In the same comparative sleep-deprivation trial, tyrosine (unlike D-amphetamine, phentermine or caffeine) produced no significant change on any polysomnography-measured sleep parameter, though it did increase prolactin release.
Human RCTHow tyrosine compares with caffeine, tryptophan and carbohydrate
This military-nutrition review concludes caffeine has the most consistent vigilance benefits, tryptophan is sedating but understudied for safety, tyrosine appears to counter stress-related cognitive and mood decline specifically, and carbohydrate mainly helps sustained physical exertion.
ReviewTyrosine and caffeine stood out from a wide supplement field
Screening 394 studies down to 37 meeting quality criteria, this review found inconsistent evidence for most cognitive-enhancement supplements, but judged tyrosine and caffeine the two with the clearest support for cognitive performance in a military context.
Systematic reviewPositioned alongside caffeine for cold-weather operations
This military nutrition review discusses caffeine and tyrosine supplementation, timed roughly 1 and 2 hours respectively before a cognitively demanding task, as a strategy that could help mitigate cold-weather declines in cognitive performance.
ReviewDiet composition changes how amino acids compete for brain entry
Healthy men ingesting different dietary proteins showed up to a 3-fold difference in the plasma ratio of tryptophan to the other large neutral amino acids - including tyrosine - that compete with it for the same transporter into the brain, illustrating why the balance of dietary amino acids matters for brain uptake.
Human studyCompeting amino acids can blunt the brain's catecholamine supply
In rats, oral branched-chain amino acids lowered brain tyrosine concentrations and catecholamine synthesis by competing for the same transporter into the brain - an effect that was prevented by co-administering tyrosine itself.
Animal studyThyroid hormone is built from paired tyrosine residues
Using cryo-EM imaging of thyroglobulin, this structural study shows thyroid hormones are formed by oxidative coupling of pairs of iodinated tyrosine residues within the thyroid gland's own hormone-precursor protein.
Mechanism150 mg/kg reversed a cold-induced memory deficit in humans
Eight men performed a delayed matching-to-sample task at 4 degrees C or 22 degrees C, two hours after 150 mg/kg tyrosine or placebo; tyrosine significantly improved matching accuracy at the longest, most cold-affected delay interval.
Human RCTBrain levels depend on competing amino acids, not blood levels alone
Analyzing serum and cerebrospinal fluid in humans and vervet monkeys, this study found tyrosine's calculated brain influx correlated only modestly with its cerebrospinal-fluid level, underscoring that competitive transport - not tyrosine intake alone - shapes how much reaches the brain.
Human & primate studyPlasma tyrosine rises in a dose-dependent, age-sensitive way
Comparing 100, 150 and 200 mg/kg doses, this trial found older adults' plasma tyrosine concentrations rose proportionally with dose and were consistently higher than young adults given the same 150 mg/kg dose.
Human RCTFrequently asked questions
What is L-Tyrosine and what does it do?
L-Tyrosine is an amino acid your body uses to help produce the catecholamines dopamine and norepinephrine. Research supports its ability to help in the management of stress of a physical or psychological origin, including lack of sleep and multitasking.
How do I take it?
Adults 18 years and older take 6 capsules in the morning on an empty stomach, or as directed by a qualified health care practitioner. Do not crush, blend or mix capsules - swallow them whole.
How long does one bottle last?
Each bottle contains 180 vegan capsules. At the recommended adult dose of 6 capsules per day, one bottle provides a 30-day supply.
What is in it besides L-tyrosine?
Each capsule contains 600 mg of L-tyrosine plus one non-medicinal ingredient, sodium stearyl fumarate; the capsule shell itself is hypromellose. The formula is vegan, gluten-free and non-GMO.
Who should not use this product?
Do not use if you are pregnant or breastfeeding, or if you have the genetic metabolic disorder phenylketonuria (PKU).
Who should consult a health care practitioner before using it?
Consult a qualified health care practitioner before use if you have hyperthyroidism, Graves' disease or active melanoma, or if you are taking dopamine, thyroid hormone medication, contraceptive medications or other psychoactive medications.
Are there any side effects to watch for?
Discontinue use and consult a health care practitioner if you experience nausea, headache, fatigue, heartburn or joint pain. Supplemental L-tyrosine may increase blood pressure or lead to difficulty sleeping in some people.
Where do I buy it?
Use the orange button on this page - it takes you to the AOR listing on Amazon.ca for secure checkout and fast delivery.
Support your stress response the easy way
Get AOR L-Tyrosine on Amazon.ca - fast, protected delivery.
Get it on Amazon.caNatural Health Product NPN 80003032. Research supports the use of L-Tyrosine to help in the management of stress of a physical or psychological origin, including lack of sleep and multitasking. The research summaries below concern the amino acid L-tyrosine and are educational - they are not claims about this finished product. Read and follow the label. Do not use if you are pregnant or breastfeeding, or if you have the genetic metabolic disorder phenylketonuria (PKU). Consult a qualified health care practitioner before use if you have hyperthyroidism, Graves' disease or active melanoma, or if you are taking dopamine, thyroid hormone medication, contraceptive medications or other psychoactive medications. Results may vary.
Important information
Safety Information
Cautions and Warnings: Do not use if you are pregnant or breastfeeding, or if you have the genetic metabolic disorder phenylketonuria (PKU). When using this product, consult a health care practitioner if you are a person with hyperthyroidism, Graves' disease or active melanoma, or if you are taking dopamine, thyroid hormone medication and/or contraceptive medications, or other psychoactive medications. Discontinue use and consult a health care practitioner if you experience nausea, headache, fatigue, heartburn or joint pain. Supplemental L-tyrosine may increase blood pressure or lead to difficulty sleeping in some persons. Other Information: GMP manufacturing, independent testing. Do not use if the safety seal is broken. Store tightly sealed in a cool, dry place.
Indications
Recommended Use or Purpose: Research supports the use of L-Tyrosine to help in the management of stress of a physical or psychological origin, including lack of sleep and multitasking.
Ingredients
Medicinal Ingredient (per capsule): L-Tyrosine 600 mg. Non-medicinal Ingredients: Sodium stearyl fumarate. Capsule: Hypromellose. Non-medicinal ingredients are subject to change - always read and follow the label for accurate ingredients, cautions and allergen information.
Directions
Recommended Dose (Adults 18 years and older): Take 6 capsules in the morning on an empty stomach, or as directed by a qualified health care practitioner. Do not crush, blend or mix capsules. Swallow capsules whole. Do not exceed the daily dose unless instructed by a health care practitioner.
Legal Disclaimer
Actual product packaging and materials may contain more and different information than shown on our website. Always read labels, warnings and directions before using or consuming a product. This item is sold and shipped by Amazon.ca; purchases are completed on Amazon.