Where to buy Tyrosine for sale online

The market situation surrounding Tyrosine presents an interesting blend of scientific relevance and commercial availability. Tyrosine, a naturally occurring amino acid, plays a vital role in protein synthesis and is often used as a supplement for its potential cognitive and physical performance benefits.

  1. Commercial Availability: Tyrosine is readily available for sale online and in physical stores as a dietary supplement. Numerous vendors and sellers offer it to a wide range of consumers interested in enhancing cognitive function, mood, and physical endurance.
  2. Research Chemical: While Tyrosine is not a designer drug or a recreational substance, it does fall under the category of research chemicals when used for scientific investigations. Researchers may buy Tyrosine in bulk to study its effects on neurotransmitter balance, particularly in contexts like stress management and cognitive function enhancement.
  3. Consumer Demand: The demand for Tyrosine has grown in recent years due to increasing interest in nootropics (cognitive-enhancing compounds) and sports supplements. Individuals looking to improve focus, alertness, and overall mental well-being are inclined to purchase Tyrosine.
  4. Legal and Regulatory Framework: Tyrosine is generally considered safe when used as directed. It is not classified as a controlled substance. However, like other supplements, its sale and marketing are subject to regulations to ensure product safety and labeling accuracy.
  5. Quality and Purity: The quality of Tyrosine supplements can vary among vendors. Consumers are advised to purchase from reputable sellers who provide transparent product information and adhere to good manufacturing practices.

In summary, the Tyrosine market primarily caters to consumers seeking cognitive and physical performance enhancement. It is not a designer drug but is widely available for both research and dietary supplementation purposes. As with any supplement, it’s crucial for buyers to exercise caution, do their research, and buy from reliable vendors to ensure product quality and safety.


Tyrosine, also referred to as L-Tyrosine and 4-hydroxyphenylalanine, is a non-essential amino acid with significant roles in the human body. It serves as a precursor for the production of essential neurotransmitters like dopamine, adrenaline, and norepinephrine. Beyond its biological functions, Tyrosine is recognized for its potential benefits when used as a supplement, often characterized as a mild stimulant.
Additionally, Tyrosine holds a pivotal position among the 22 amino acids responsible for protein synthesis in cellular processes. This amino acid is abundantly found in various high-protein foods, including chicken, turkey, fish, cottage cheese, cheese, yogurt, almonds, milk, avocados, bananas, peanuts, pumpkin seeds, sesame seeds, and soy-based products.
Emerging evidence suggests that Tyrosine supplementation can impact cognitive performance, particularly in working memory tasks, especially when individuals are under stress. There are indications that Tyrosine may enhance convergent thinking, particularly in multitasking scenarios. Notably, in a study, Tyrosine appeared to counteract some of the adverse effects of sleep deprivation on cognitive functions.
However, it’s important to note that if Tyrosine’s mechanism of action involves elevating catecholamine levels (like dopamine), its effects may be relatively short-lived. Some animal studies have demonstrated that dopamine levels can quickly return to their baseline levels.
In essence, Tyrosine plays a multifaceted role in both biochemical processes and cognitive performance enhancement, making it a subject of interest in various scientific investigations and dietary supplementation.

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Tyrosine, an amino acid derived from phenylalanine, belongs to the category of non-essential amino acids. Its chemical structure consists of a para-hydroxylated phenyl ring connected to a pentanoic acid group. It is characterized by a five-membered carbon chain concluding with a carboxyl (C(=O)OH) group on the terminal carbon. Positioned at R2 in this pentanoic acid chain, there’s an amino group-oriented in the levorotary configuration.
There are three structural isomers of L-tyrosine. The most common form is para-tyrosine (para-tyr, p-tyr, or 4-hydroxyphenylalanine). Additionally, there are two less common regioisomers: meta-tyrosine (also known as 3-hydroxyphenylalanine, L-m-tyrosine, and m-tyr) and ortho-tyrosine (o-tyr or 2-hydroxyphenylalanine). These rare isomers are produced through non-enzymatic free-radical hydroxylation of phenylalanine under conditions of oxidative stress.
In the realm of biological synthesis, plants, and most microorganisms produce tyrosine via prephenate, an intermediate within the shikimate pathway. Prephenate undergoes oxidative decarboxylation while retaining the hydroxyl group, resulting in p-hydroxyphenylpyruvate. This compound is transaminated using glutamate as the nitrogen source, ultimately yielding tyrosine and α-ketoglutarate.
In mammals, tyrosine is synthesized from the essential amino acid phenylalanine, which is obtained from dietary sources. The enzyme phenylalanine hydroxylase, a monooxygenase, facilitates the conversion of phenylalanine to tyrosine. This enzyme catalyzes a reaction that introduces a hydroxyl group to the six-carbon aromatic ring of phenylalanine, transforming it into tyrosine.


The effects of tyrosine, whether taken as a supplement or considered a psychoactive compound, are attributed to its role as a precursor to catecholamine neurotransmitters. When supplemental L-Tyrosine is ingested, it undergoes a series of conversions in the body. First, it transforms into L-DOPA and subsequently undergoes decarboxylation to become dopamine. This dopamine is further converted into norepinephrine and eventually epinephrine. Consequently, this process significantly elevates the levels of these neurotransmitters in the brain, leading to stimulating and euphoric effects. These three neurotransmitters collectively fall under the category known as “catecholamines.”
However, it’s important to note that the body’s synthesis of catecholamines from tyrosine operates within a localized substrate pool. This means that the subjective effects of tyrosine may reach an upper limit at higher dosages, rendering additional supplementation ineffective for intensifying stimulation (citation needed).
Beyond its role as a proteinogenic amino acid, tyrosine possesses a unique function due to its phenol functionality. It is found in proteins involved in signal transduction processes and serves as a receptor for phosphate groups transferred by protein kinases. Phosphorylation of the hydroxyl group can alter the activity of the target protein or participate in a signaling cascade through SH2 domain binding.

Subjective effects

When compared to conventional stimulants like amphetamine and methylphenidate, tyrosine exhibits a distinct profile characterized by a more “natural” sensation, reduced jitteriness, fewer side effects, and a milder post-use “crash.” It is notably less coercive, lacking a pronounced body high, and while it offers less euphoria and recreational potential, it leans more toward functional effects.

Please note that the effects described below are based on anecdotal user reports and the subjective analyses of contributors to the Subjective Effect Index (SEI) on PsychonautWiki. These effects should be regarded with a degree of skepticism.

It’s essential to understand that these effects may not occur predictably or consistently, with higher doses being more likely to induce the full spectrum of products. Moreover, higher doses can increase the risk of adverse effects, including addiction, severe harm, or even fatality ☠.


  • Stimulation
  • Appetite suppression
  • Headache (typically only at heavy doses)
  • Nausea (typically only at heavy doses)


The “comedown” experienced after a stimulant high is generally characterized by negative and uncomfortable effects due to neurotransmitter depletion. While tyrosine results in a notably less intense and painful comedown compared to traditional stimulants like amphetamine or methylphenidate, it still exists and may involve:

  • Cognitive fatigue
  • Thought deceleration
  • Anxiety
  • Depression
  • Increased wakefulness
  • Irritability


  • Anxiety suppression
  • Enhancement of analytical abilities
  • Mild mental euphoria at higher doses
  • Increased creativity
  • Improved focus
  • Heightened libido
  • Enhanced appreciation of music
  • Increased wakefulness
  • Memory improvement
  • Accelerated thought processes
  • Enhanced motivation
  • Improved stamina

In summary, tyrosine offers a more balanced and functional stimulant experience, with a reduced likelihood of negative side effects and a gentler comedown compared to traditional stimulants. However, individual responses can vary, and caution should always be exercised when using any psychoactive substances.


Tyrosine is considered physically safe, with no known association with brain damage and an extremely low toxicity relative to dosage. Similar to many other nootropic substances, acute exposure to tyrosine is associated with relatively few physical side effects. Various studies have indicated that when taken in reasonable doses within a controlled context, it does not appear to result in any adverse cognitive, psychiatric, or toxic physical consequences. However, it is highly advisable to practice harm reduction when using this substance.

Tolerance and Addiction Potential: 

Tyrosine may have mild habit-forming potential, possibly due to its dopaminergic properties. However, when compared to more conventional stimulants like amphetamine or methylphenidate, its addictive or compulsive potential is significantly lower.

Tolerance to tyrosine’s effects can develop relatively quickly with repeated and frequent use. It typically takes about seven days for the tolerance to decrease by half and around 14 days for it to return to baseline in the absence of further consumption. Importantly, tyrosine induces cross-tolerance with other dopaminergic stimulants, meaning that its use can reduce the effects of most other stimulant compounds.

Dangerous Interactions: 

Caution is necessary when combining tyrosine with other substances, as many psychoactive compounds that are individually safe can become dangerous when mixed with certain others. Here are some known dangerous interactions to be aware of:

  • Stimulants: Tyrosine has inherent stimulatory properties, so combining it with other stimulatory pharmaceuticals or supplements may lead to dangerously elevated blood pressure or heart rate.
  • 25x-NBOMe & 25x-NBOH: These compounds are highly stimulating and physically taxing. Avoid combining them with tyrosine to prevent excessive stimulation and potential heart strain, which can result in increased blood pressure, vasoconstriction, panic attacks, thought loops, seizures, and, in extreme cases, heart failure.
  • Alcohol: Combining alcohol with stimulants, including tyrosine, can be risky due to the potential for accidental over-intoxication. Stimulants can mask alcohol’s depressant effects, making it challenging to gauge one’s level of intoxication. After the stimulant’s effects wear off, the depressant effects may dominate, leading to blackouts and severe respiratory depression. If combined, limit alcohol consumption strictly.
  • DXM: Avoid combining DXM with tyrosine due to DXM’s inhibitory effects on serotonin and norepinephrine reuptake, which can increase the risk of panic attacks, hypertensive crisis, or serotonin syndrome when combined with serotonin releasers (such as MDMA, methylone, mephedrone, etc.). Monitor blood pressure carefully and refrain from strenuous physical activity.
  • MDMA: Combining MDMA with tyrosine may heighten MDMA’s potential neurotoxic effects, as well as pose risks of elevated blood pressure and heart strain (cardiotoxicity).
  • MXE: Some reports suggest that combining MXE with tyrosine could dangerously elevate blood pressure and increase the risk of mania and psychosis.
  • Dissociatives: Both tyrosine and dissociatives carry the risk of inducing delusions, mania, and psychosis. Combining them may amplify these risks.
  • Stimulants: Combining tyrosine with other stimulants like cocaine can potentially lead to dangerously increased heart rate and blood pressure levels.
  • Tramadol: Tyrosine should be used cautiously with tramadol, as tramadol is known to lower the seizure threshold, and combining it with stimulants may further increase this risk.
  • MAOIs: Combining tyrosine with MAOIs can lead to dangerously elevated levels of neurotransmitters like dopamine, which can have fatal consequences. Examples of MAOIs include Syrian rue, banisteriopsis caapi, and certain antidepressants.
  • Cocaine: This combination may place additional strain on the heart and should be avoided.

It is essential to exercise extreme caution and conduct thorough research when considering combinations of substances, as they can lead to unexpected and potentially harmful effects.

Legal status

Tyrosine is unscheduled across the world and is not known to be specifically illegal within any country.


1. What is Tyrosine?

  • Tyrosine is a non-essential amino acid, which means your body can produce it on its own. It serves as a precursor to several important neurotransmitters, including dopamine, norepinephrine, and epinephrine.

2. What are the natural dietary sources of Tyrosine?

  • Tyrosine can be found in various high-protein foods such as chicken, turkey, fish, dairy products, almonds, bananas, and soy-based products.

3. What is the role of Tyrosine in the body?

  • Tyrosine plays a crucial role in the synthesis of neurotransmitters, which are essential for regulating mood, stress response, and cognitive function. It also contributes to protein synthesis.

4. Is Tyrosine safe to take as a supplement?

  • Tyrosine supplements are generally considered safe when taken in recommended doses. However, it’s important to consult with a healthcare professional before starting any new supplement regimen, especially if you have pre-existing medical conditions or are taking other medications.

5. What are the potential cognitive benefits of Tyrosine?

  • Some research suggests that Tyrosine supplementation may improve cognitive functions, particularly in situations of stress or sleep deprivation. It is believed to enhance focus, motivation, and memory.

6. Is Tyrosine habit-forming or addictive?

  • Tyrosine may have mild habit-forming potential due to its dopaminergic properties. However, it is not as addictive or compulsive as more traditional stimulants like amphetamine.

7. Can Tyrosine have side effects?

  • Tyrosine is generally well-tolerated, but some individuals may experience side effects such as headache or nausea, particularly at higher doses. It’s crucial to follow recommended dosage guidelines.

8. How quickly does tolerance develop with Tyrosine use?

  • Tolerance to Tyrosine’s effects can develop relatively quickly with repeated and frequent use. It typically takes about seven days for the tolerance to decrease by half and around 14 days to return to baseline without further consumption.

9. Are there dangerous interactions with Tyrosine and other substances?

  • Yes, there can be dangerous interactions when combining Tyrosine with certain substances, especially stimulants or drugs that affect neurotransmitter levels. Always research potential interactions and consult with a healthcare professional if you have concerns.

10. Is Tyrosine suitable for everyone? 

  • While Tyrosine is generally safe, it may not be suitable for individuals with certain medical conditions or those taking specific medications. Pregnant or nursing women and children should also consult with a healthcare provider before using Tyrosine supplements.

11. Can Tyrosine be used to treat medical conditions? 

  • Tyrosine supplementation is not a standalone treatment for medical conditions. However, it may be recommended as part of a broader treatment plan for specific conditions, such as phenylketonuria (PKU) or depression.

12. Where can I purchase Tyrosine supplements? 

  • Tyrosine supplements are available over-the-counter at pharmacies, health food stores, and online retailers. It’s essential to purchase from reputable sources to ensure product quality and safety.

13. How should I take Tyrosine supplements? 

  • The recommended dosage of Tyrosine supplements can vary. It’s best to follow the instructions on the product label or consult with a healthcare professional for personalized guidance.

14. Can Tyrosine supplements be combined with other nootropics or supplements? 

  • Combining Tyrosine with other supplements or nootropics should be done with caution. Some combinations may have unpredictable effects or risks, so it’s advisable to seek expert advice before mixing substances.

15. Is Tyrosine regulated by any authorities? 

  • Tyrosine supplements are typically regulated as dietary supplements in many countries. It’s essential to choose products from reputable manufacturers that adhere to quality and safety standards.

Please note that this FAQ provides general information, and individual responses to Tyrosine may vary. Always consult with a healthcare professional before starting any new supplement or medication regimen, especially if you have specific health concerns.


  1. Tyrosine, an amino acid with various roles in the body, is naturally present in several dietary sources.
  2. A study published in “Kidney International” in November 2005 explored the urinary excretion of ortho-tyrosine in diabetes mellitus and renal failure, providing insights into hydroxyl radical production.
  3. Research in “Free Radical Research” in January 2005 delved into the accumulation of hydroxyl free radical markers, including meta-tyrosine and ortho-tyrosine, in cataractous lenses and their relationship with protein and phenylalanine content.
  4. The biosynthesis of catecholamines, which include dopamine, was investigated in the “Journal of Neural Transmission” in November 2009, shedding light on the role of tyrosine hydroxylase.
  5. For comprehensive information on tyrosine, its uses, side effects, precautions, interactions, dosing, and reviews, refer to relevant sources.
  6. A study in “Molecular Brain” from November 2010 explored the impact of NMDAR2B tyrosine phosphorylation on anxiety-like behavior and CRF expression in the amygdala.
  7. Research in “Neuroscience” from January 2004 investigated the effects of neonatal thyroxine treatment on corticotropin-releasing-factor (CRF) and neuropeptide Y (NPY) containing neurons and tyrosine hydroxylase positive fibers in the amygdala.
  8. “Brain Research” in September 2003 presented findings on the behavioral consequences of protein tyrosine phosphatase alpha (PTPα) knockout mice, including effects on learning, locomotor activity, and anxiety.
  9. Tyrosine’s role in promoting deep thinking and creativity was explored in “Psychological Research” in September 2015.
  10. A study published in “Pharmacology, Biochemistry, and Behavior” in November 1999 demonstrated that tyrosine could improve working memory in a multitasking environment.
  11. The benefits of tyrosine supplementation in mitigating working memory decrements during cold exposure were examined in “Physiology & Behavior” in November 2007.
  12. Be cautious when combining substances, as interactions can be dangerous. Always conduct thorough research to ensure safety. For instance, stimulants may interact with tyrosine, potentially affecting blood pressure and heart rate.
  13. The risk of excessive stimulation and heart strain makes it important to avoid combining tyrosine with 25x-NBOMe & 25x-NBOH compounds.
  14. Alcohol combined with stimulants like tyrosine can be risky, potentially leading to over-intoxication and blackouts.
  15. Combining tyrosine with substances like DXM or MDMA may increase the risk of panic attacks, hypertensive crises, or serotonin syndrome.
  16. Tyrosine may increase heart strain when combined with cocaine.
  17. Use caution and consult with healthcare professionals when considering interactions with tyrosine.

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