L-Tyrosine: Unlocking The Power Of This Essential Amino Acid

Our body is a complex piece of machinery that engages in a host of processes to keep us functioning optimally. That being said, sometimes our body doesn’t function as well as it should. As such, we might turn to supplements containing compounds that can support us in certain areas. An excellent example of this is taking L-tyrosine. That being said, knowing everything about a compound before you incorporate it into your wellness routine is critical. In this article, we'll delve into the topic of L-tyrosine – an essential amino acid that plays a vital role in overall well-being.

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The Definition: L-tyrosine is an essential amino acid that supports the body’s many biochemical processes. L-tyrosine is synthesized from phenylalanine, which can be found in various food sources. 

The Process: L-tyrosine levels can naturally be raised by eating phenylalanine-rich foods, which include meat and poultry, seafood, nuts, dairy, and eggs. However, L-tyrosine can also be manufactured and incorporated into supplements for those who need that added boost outside of their diet. 

How To Take: As stated above, L-tyrosine can either be taken as a supplement or raised by increasing the number of phenylalanine-rich foods in your diet. There’s currently no suggested amount of L-tyrosine to take if you’re looking to incorporate it into your wellness routine. However, some studies have used as much as 100 mg per 2.2 pounds of body weight daily.

History:  L-tyrosine was first isolated from cheese by German chemist Justus Von Liebig in 1846. It has been since explored by other scientists to better understand how it functions within the body and what benefits it offers. 

The Breakdown: What Is L-Tyrosine?

L-tyrosine is a naturally occurring amino acid that serves as a building block for proteins in the body. It is produced from another amino acid called phenylalanine and can also be obtained through dietary sources. L-tyrosine is involved in various biochemical processes in the body and is particularly important for the production of neurotransmitters.


How Does L-Tyrosine Work?

L-tyrosine works by serving as a precursor for important neurotransmitters in the brain, such as dopamine, adrenaline (epinephrine), and noradrenaline (norepinephrine). As an amino acid, L-tyrosine is converted into these neurotransmitters through a series of biochemical reactions in the body.1

Neurotransmitters are chemical messengers that play a crucial role in communication between nerve cells (neurons) in the brain. They are involved in various physiological functions, including mood regulation, stress response, cognitive function, and more.


What is L-Tyrosine?


Why Is L-Tyrosine Important?

L-tyrosine plays a crucial role in the synthesis of several important neurotransmitters, including dopamine, norepinephrine, and epinephrine. These neurotransmitters are involved in regulating mood, stress response, and cognitive function. By supporting their production, L-tyrosine helps maintain optimal mental and emotional well-being.

What Are The Benefits Of L-Tyrosine?

Enhances Mental Performance

L-tyrosine has been shown to improve cognitive function and mental performance, especially in situations involving stress or fatigue.2 It may help increase focus, attention, and memory, making it a valuable supplement for students, professionals, and individuals seeking cognitive support.

Promotes Stress Relief

Stress can deplete the levels of neurotransmitters in the brain, leading to fatigue and mood disturbances. L-tyrosine supplementation may help replenish these neurotransmitters, thereby supporting stress management and promoting a more balanced mood.

Supports Thyroid Function

L-tyrosine is a key component of thyroid hormones, which play a crucial role in regulating metabolism. Adequate levels of L-tyrosine are essential for maintaining optimal thyroid function, ensuring proper metabolism and energy levels.

Assists In Appetite Control

Some studies suggest that L-tyrosine may help regulate appetite and promote weight management. By supporting the production of neurotransmitters involved in appetite control, it may contribute to a healthy eating pattern.3

What Are The Uses Of L-Tyrosine?

L-tyrosine is an essential amino acid vital in maintaining optimal brain health and function. This remarkable nutrient involves various physiological processes, including synthesizing crucial neurotransmitters and hormones.

Additionally, L-tyrosine contributes to the production of melanin, the pigment responsible for determining hair, skin, and eye color. Furthermore, it supports a healthy thyroid function, pivotal in regulating metabolism. Let's explore further why L-tyrosine is so important.

Neurotransmitter Synthesis

L-tyrosine is a precursor for producing essential neurotransmitters such as dopamine, norepinephrine, and epinephrine. These neurotransmitters regulate mood, stress response, and cognitive functions. Adequate levels of L-tyrosine are necessary to ensure the proper synthesis of these neurotransmitters, promoting mental well-being and cognitive performance.

Hormone Production

L-tyrosine is also involved in synthesizing important hormones, including thyroid hormones. Thyroid hormones are crucial for maintaining a healthy metabolism, regulating body temperature, and supporting overall energy levels. L-tyrosine supports the thyroid gland's ability to produce these vital hormones, ensuring optimal metabolic function.

Melanin Production

L-tyrosine is essential for producing melanin, the pigment responsible for determining our hair, skin, and eye color. Adequate levels of L-tyrosine are necessary for the body to synthesize melanin effectively. This highlights the importance of L-tyrosine in maintaining the integrity and diversity of our physical appearance.

Is It Safe To Take L-Tyrosine Every Day?

Absolutely! L-tyrosine is generally considered safe for daily use. As a naturally occurring amino acid, it is found in various foods and is an essential component of protein synthesis in the body. 

However, it's always a good idea to follow the recommended dosage guidelines provided by the manufacturer or consult with a healthcare professional to ensure the appropriate intake for your specific needs.

Who Should Use L-Tyrosine?

L-tyrosine can be beneficial for a wide range of individuals. Here are some examples of people who may find L-tyrosine particularly helpful:

Students And Professional

L-tyrosine may aid in improving focus, attention, and cognitive performance, making it valuable for students studying for exams or professionals seeking mental clarity in demanding work environments.4

Individuals Under Stress

L-tyrosine can support individuals experiencing stressful situations by replenishing neurotransmitters involved in stress response, potentially promoting a more balanced mood and emotional well-being.

Those Looking To Support Thyroid Function

Since L-tyrosine is a precursor for thyroid hormone synthesis, individuals concerned about their thyroid health may find it beneficial to support optimal thyroid function.

Those Interested In Appetite Control

While L-tyrosine alone may not directly suppress or increase appetite, it regulates neurotransmitters related to appetite control. As part of a balanced diet and healthy lifestyle, L-tyrosine may contribute to a more regulated eating pattern.

Should L-Tyrosine Be Taken In The Morning Or At Night?

The timing of L-tyrosine intake is flexible and can be adjusted based on personal preference and desired outcomes. Some individuals find it beneficial to take L-tyrosine in the morning to support mental focus and cognitive performance throughout the day. 

Others prefer taking it later in the day to help manage stress or promote relaxation in the evening. Ultimately, the best time to take L-tyrosine depends on your individual needs and goals. Experiment with different timings to find what works best for you.

Does L-Tyrosine Boost Your Metabolism?

While L-tyrosine is involved in thyroid hormone production, which regulates metabolism, it's important to note that L-tyrosine alone is not a magic solution for boosting metabolism. The impact of L-tyrosine on metabolism may be indirect and more related to supporting optimal thyroid function. A healthy and balanced diet, regular physical activity, and overall lifestyle choices are key factors in maintaining a healthy metabolism.

Are There Any Down Sides To L-Tyrosine?

While L-tyrosine is generally safe for most people, there are a few potential downsides. Some individuals may experience mild side effects like nausea, headaches, heartburn, or gastrointestinal discomfort, although these are rare and typically occur at higher doses6. L-tyrosine may also interact with certain medications, including thyroid hormone medications and Levodope (a dopamine replacement agent), so it's important to consult with a healthcare professional if you're taking any prescription drugs. 

Additionally, individual responses to L-tyrosine can vary, with some people not experiencing the desired benefits or even having adverse reactions. People with certain health conditions, such as hyperthyroidism or phenylketonuria, should avoid L-tyrosine, and pregnant or breastfeeding women should consult their healthcare provider before using it. It's important to be aware of potential downsides and seek professional advice to determine if L-tyrosine suits your circumstances.

What Are The Alternatives To L-Tyrosine?

If you're looking for alternatives to L-tyrosine, consider the following options:


As mentioned earlier, L-tyrosine is produced from phenylalanine. Increasing your intake of phenylalanine-rich foods like meat, fish, eggs, dairy products, and soy can indirectly support L-tyrosine production.

Dietary Sources

Incorporating foods rich in L-tyrosine into your diet is another way to obtain this amino acid naturally. Good dietary sources include poultry, fish, dairy products, avocados, almonds, and pumpkin seeds.

What Is The History Of L-Tyrosine And Why Is It Significant?

L-tyrosine has a fascinating history that dates back to its discovery in the early 19th century. It was first isolated from cheese in 1846 by a German chemist, Justus Von Liebig. Over the years, researchers have unraveled its role as a precursor to important neurotransmitters and its involvement in various physiological processes.5

Understanding the history of L-tyrosine allows us to appreciate the scientific advancements that have shed light on its significance in overall well-being. As a wellness brand topic, delving into the historical background of L-tyrosine helps us grasp its long-standing relevance and the continuous exploration of its benefits.

How Is L-Tyrosine Currently Used In The Wellness World?

In the present-day wellness landscape, L-tyrosine has gained recognition as a valuable supplement for supporting mental performance, stress management, and overall cognitive function. With increasing awareness of the importance of mental well-being, many individuals are seeking natural solutions to enhance focus, boost mood, and improve productivity.

What Exciting Possibilities And Potential Discoveries Lie In The Future Of L-Tyrosine?

Looking ahead, the future of L-tyrosine holds promise for further advancements and discoveries. Ongoing research aims to deepen our understanding of its mechanisms of action, explore new applications, and uncover potential synergies with other compounds.

Being forward-thinking and staying abreast of emerging trends and scientific developments surrounding L-tyrosine is vital as a wellness brand. By embracing the future of L-tyrosine, we can continue to provide innovative products that meet the evolving needs of our audience and contribute to their overall well-being.

FOCL FAQs: L-Tyrosine

Can L-tyrosine boost athletic performance?

While L-tyrosine has been suggested to support mental performance during demanding activities, its direct impact on physical performance remains inconclusive.

Can I take L-tyrosine with other supplements?

L-tyrosine is generally safe to take alongside other supplements. However, it's always a good idea to consult with a healthcare professional to ensure there are no potential interactions or contraindications.

What is the recommended dosage of L-tyrosine?

The optimal dosage of L-tyrosine can vary depending on individual needs and health conditions. It's best to follow the dosage instructions provided by the manufacturer or consult a healthcare professional for personalized advice.

Is L-tyrosine suitable for vegetarians and vegans?

Yes, L-tyrosine is suitable for vegetarians and vegans. However, if you follow a plant-based diet, it's important to ensure an adequate intake of phenylalanine, as it is the precursor to L-tyrosine.

Can L-tyrosine be taken during pregnancy or breastfeeding?

It's recommended to avoid L-tyrosine supplementation during pregnancy and breastfeeding unless specifically advised by a healthcare professional. The safety and optimal dosage for these periods have not been well-established, so it's best to prioritize the health of both the mother and the baby by consulting with a healthcare provider.

Can L-tyrosine cause sleep disturbances or insomnia?

L-tyrosine is not typically associated with causing sleep disturbances or insomnia. However, individual responses may vary, and some individuals may be more sensitive to its effects. 

If you experience any sleep-related issues after taking L-tyrosine, it's advisable to adjust the timing or dosage and consult with a healthcare professional if the problem persists.

Is L-tyrosine addictive?

L-tyrosine itself is not addictive. It is a naturally occurring amino acid and does not possess addictive properties. However, if you have concerns about addictive behaviors or dependencies, it's essential to address them with a healthcare professional who can provide appropriate guidance and support.

What vitamin is L-tyrosine?

L-tyrosine falls into the category of amino acids and is not categorized as a vitamin. Amino acids are the building blocks of proteins and play essential roles in various physiological processes in the body. L-tyrosine, specifically, is a non-essential amino acid, meaning that the body can produce it from other amino acids.

It is involved in the synthesis of important neurotransmitters like dopamine, norepinephrine, and epinephrine, which regulate mood, stress response, and cognitive function. While L-tyrosine is not considered a vitamin, it is still recognized for its significant contributions to overall health and well-being.

What foods are high in L-tyrosine?

There is a variety of foods that are rich in L-tyrosine. These include meat such as chicken, turkey, beef, and pork. Dairy products like cheese, milk, and yogurt also contain notable amounts of L-tyrosine. Fish such as salmon, tuna, and trout are another source. Legumes like soybeans and lentils, as well as seeds and nuts like pumpkin seeds, sesame seeds, almonds, and peanuts, are good options. 

Whole grains like oats, wheat, and quinoa provide L-tyrosine as well. Additionally, avocados, bananas, leafy green vegetables like spinach and kale, and even spirulina, a type of algae, are among the foods that are high in L-tyrosine. Incorporating these foods into one's diet can help increase L-tyrosine intake naturally.


  1. “Tyrosine.” Mount Sinai Health System, www.mountsinai.org/health-library/supplement/tyrosine. Accessed 17 July 2023. 
  2. Bloemendaal, M., Froböse, M. I., Wegman, J., Zandbelt, B. B., Cools, R., & Aarts, E. (2018). Neuro-Cognitive Effects of Acute Tyrosine Administration on Reactive and Proactive Response Inhibition in Healthy Older Adults. ENeuro, 5(2). https://doi.org/10.1523/ENEURO.0035-17.2018
  3. Miller, G. D. (2019). Appetite Regulation: Hormones, Peptides, and Neurotransmitters and Their Role in Obesity. American Journal of Lifestyle Medicine, 13(6), 586-601. https://doi.org/10.1177/1559827617716376
  4. Deijen JB, Wientjes CJ, Vullinghs HF, Cloin PA, Langefeld JJ. Tyrosine improves cognitive performance and reduces blood pressure in cadets after one week of a combat training course. Brain Res Bull. 1999 Jan 15;48(2):203-9. doi: 10.1016/s0361-9230(98)00163-4. PMID: 10230711.
  5. Teleanu, R. I., Niculescu, G., Roza, E., Vladâcenco, O., Grumezescu, A. M., & Teleanu, D. M. (2022). Neurotransmitters—Key Factors in Neurological and Neurodegenerative Disorders of the Central Nervous System. International Journal of Molecular Sciences, 23(11). https://doi.org/10.3390/ijms23115954
  6. “Tyrosine: Overview, Uses, Side Effects, Precautions, Interactions, Dosing and Reviews.” WebMD, www.webmd.com/vitamins/ai/ingredientmono-1037/tyrosine. Accessed 17 July 2023.