L-Tyrosine Review: Benefits, Dosage, Side Effects & Uses

In this review, we will take an in-depth look at l-tyrosine, the benefits of l-tyrosine, the best dosage, side effects, and reviews from other users on Reddit.

Interested in boosting your brainpower with an amino acid supplement?

L-tyrosine is a cognitive enhancer that has been shown to improve memory, focus, and mental clarity. It does this by increasing levels of dopamine and norepinephrine, two neurotransmitters that are essential for optimal cognitive function.

If you’re looking for an all-natural way to boost your productivity, l-tyrosine may be the supplement for you.

It not only supports cognitive function but also helps to maintain a positive mood. This makes it the perfect choice for anyone who wants to stay sharp and focused throughout the day.

But what are the side effects of l-tyrosine? What is l-tyrosine used for exactly? And where is the best place to buy l-tyrosine online? Let's take a closer look below.

What is L-Tyrosine?

L-Tyrosine Review

Before we get into the nitty-gritty of this L-tyrosine review, let's first understand what it is and where it comes from.

Tyrosine is an amino acid that is naturally found in the diet, while L-tyrosine is a synthetic form of the amino acid.

Tyrosine is found in foods like meats, dairy, fish, and beans, while L-tyrosine must be taken as a supplement.

Tyrosine is broken down by the liver and does not cross the blood-brain barrier, while L-tyrosine can cross the blood-brain barrier and has been shown to improve cognitive performance [R].

As it supports neurotransmission overall, l-tyrosine has the power to influence our hormonal balance and general mood. L-tyrosine also contributes to the production of epinephrine and norepinephrine, both monoamines that fit in the same category as dopamine and serotonin.

What are Amino Acids?

Amino acids are organic compounds that combine to help build protein. Protein is needed for a variety of important purposes in the body but is mostly used to form and repair muscle tissue. Amino acids also help our hormones and neurotransmitters function [R].

There are 20 amino acids in total: 9 essential amino acids and 11 non-essential amino acids. The 9 essential amino acids are valine, leucine, isoleucine, and lysine - collectively known as BCAA - threonine, phenylalanine, methionine, histidine, and tryptophan [R].

What are Neurotransmitters?

A neurotransmitter is a chemical process that acts as a messenger or signal sent between neurons or nerve cells. Neurotransmitters influence signals in the brain in humans, affecting our mood, and manage the natural responses to these signals, such as heart rate and breathing.

Neurotransmitters can be divided into amino acids, peptides, and monoamines. The most well-known neurotransmitters are dopamine, serotonin, histamine, norepinephrine, epinephrine, phenethylamine, and oxytocin [R].

What is L-Tyrosine Used For?

While l-tyrosine is identified as an amino acid that supports the production of neurotransmitters, it is also a neurotransmitter. Neurotransmitters send messages to our brain, releasing brain chemicals such as dopamine and serotonin.

L-tyrosine helps to produce, as well as support, these neurotransmitters. This means that users taking l-tyrosine as a supplement can experience increased levels of dopamine and other chemicals, which, in turn, boost motivation, happiness, and excitement [R].

L-tyrosine, therefore, is used to improve cognition, productivity, and general mood. Depending on the desired intention of the user, l-tyrosine can be used to benefit studying, mental tasks that require focus, and physical performance for prolonged periods which is important in people who suffer from sleep deprivation and stress.

L-Tyrosine Benefits

As an amino acid, l-tyrosine’s main benefits include producing protein and aiding neurotransmitters.

Protein helps our muscles repair and recover, while neurotransmitters are the messengers that release chemicals in the brain to make us feel various positive feelings.

Narrowed down, l-tyrosine specifically speeds up the production of monoamines such as dopamine, epinephrine, and norepinephrine. Studies show that l-tyrosine may also increase levels of serotonin, the “happy hormone” [R].

Epinephrine and norepinephrine support cardiovascular functions and adrenaline, while dopamine influences feelings of motivation, excitement, contentment, and general happiness.

Because L-tyrosine is a precursor to epinephrine, norepinephrine, and dopamine it may also be beneficial for people who are looking for a weight loss supplement since it can speed up the metabolism.

Therefore, the benefits of l-tyrosine include:

  • Improved protein production
  • Neurotransmitter synthesis and functioning
  • Increased dopamine levels
  • Improved cardiovascular performance
  • Feelings of motivation and excitement
  • Overall mood enhancement
  • Improved cognition (concentration, memory processing, and alertness)
  • Increased energy levels
  • Increased productivity

L-tyrosine, and tyrosine supplementation in general, have also been shown to be beneficial when used for phenylketonuria (pku), a rare genetic disorder that affects how the body breaks down protein [R] as well as in people who suffer from Parkinson's Disease [R].

Does L-Tyrosine Increase Dopamine?

One of the main reasons l-tyrosine has become such a widely used supplement is because of its potential to increase levels of dopamine in the brain [R]. Dopamine is known as the “feel-good hormone”, and plays a big part in how we feel on a daily basis.

If you have felt the sudden motivation to work out, or felt excited about a prospect in the future, it is caused by a dopamine release in the brain. More specifically, the part of the brain that contains the reward system.

While dopamine is produced in the body, l-tyrosine can supplement this process and, as a result, further influence our mood. Users of l-tyrosine supplements claim to experience heightened levels of motivation and cognition and therefore increased productivity.

L-Tyrosine Dosage

Clinical trials show 100 mg to 200 mg to be a safe daily dosage for l-tyrosine [R]. L-tyrosine is typically a single dose application, administered orally, in the form of a capsule, tablet, or dissolvable powder.

The popular dosage of l-tyrosine for best results is 150 mg, once a day. Due to l-tyrosine’s stimulative effects, it is generally best taken early in the day.

As with any dietary supplement or medication, it is best to follow the recommended dosage on the original packaging and consult with a doctor if you have any concerns. It is also recommended to take l-tyrosine with or just before a meal.

L-Tyrosine Side Effects

Are there any negative side effects of taking l-tyrosine?

The FDA (Food and Drug Administration) has given l-tyrosine GRAS recognition, which stands for “generally recognized as safe” [R].

Reported side effects of taking l-tyrosine, however, may include:

  • Nausea
  • Heartburn
  • Headache
  • Joint pain
  • Tiredness
  • Diarrhea/upset stomach

In most cases, when taken by healthy individuals at the recommended doses, and not mixed with any other medications (like levodopa or MAOIs for blood pressure), l-tyrosine is a safe dietary supplement with no harmful side effects.

As with any dietary supplement or form of self-medication, it is widely recommended to take l-tyrosine alone (not with other medication, drugs, or alcohol), and to ingest it at mealtimes for safe and effective absorption into the system.

Evidence also shows that l-tyrosine has no known negative effects on individuals with ADHD (attention deficit hyperactivity disorder), bipolar disorder, and BPD (borderline personality disorder) [R].

In fact, one study shows that tyrosine can be used as a treatment for mental disorders like depression [R].

L-Tyrosine Reviews Shared on Reddit

Read reviews and experiences from l-tyrosine Reddit users down below.

According to brainisbrokensos:

“For the past few months, I’ve been experimenting with l-tyrosine. I suspected some sort of dopamine deficiency, and caffeine only worked somewhat, so I tried it out.

The first few days I wasn’t sure if it was placebo, but I felt better. Then, at the end of the first week, the results were amazing (and consistently stayed amazing after that). It’s like I see the world in a whole new perspective. It’s how I imagine non-depressed people see the world. I got a more level-headed and more big-picture perspective. My anxiety pretty much disappeared. Even the colours look prettier!”

According to roman_s:

“L-tyrosine is one of the most overlooked supplements.

Out of 100s of vitamins, minerals, amino acids, RCs, Rx consumed to treat: depression, GAD, low motivation many supplements have had little to no changes. One supplement that has completely blown my mind has been L-Tyrosine for essentially the underlying symptoms from depression/anxiety.

L-Tyrosine seems to almost alleviate all anxiety and any depressive symptoms.”

According to c_o_r_b_a:

“Despite taking it multiple times daily for about 4 years, I still seem to very consistently get strong positive effects from L-tyrosine.

It feels like an almost limitless supply of supplementary dopamine most of the time. Like, it feels as though it shouldn’t work nearly as well as it does, especially after so long. Light euphoria, motivation, energy, etc.”

Where to Buy L-Tyrosine Online?

If you are looking to try l-tyrosine, Pure Nootropics offers nootropics that are independently tested to make sure each product meets high-quality standards. If you want more information head over to Pure Nootropics here:

What’s great about l-tyrosine from Pure Nootropics is that it contains no preservatives, artificial colors, or additives, and is suitable for vegans. Through Pure Nootropics, customers also receive worldwide shipping, same-day dispatch, and free refunds if returned within 30 days.

Frequently Asked Questions

View frequently asked questions about l-tyrosine below.

Does L-Tyrosine Give You Energy?

L-tyrosine may increase energy levels. This is because l-tyrosine is an amino acid that directly supports the production of neurotransmitters such as dopamine, a brain chemical known to increase feelings of motivation, excitement, and happiness.

For this reason, l-tyrosine has a wide audience that uses l-tyrosine as a nootropic, or smart drug, which can increase motivation, concentration, alertness, energy levels, memory, contentment, and productivity.

Is L-Tyrosine Good for Anxiety?

In the same way that l-tyrosine may enhance feelings of motivation and excitement through increased dopamine, many users claim that l-tyrosine reduces anxiety, depression, and feelings of dissatisfaction.

The reason for this is that l-tyrosine is an important amino acid for the production of neurotransmitters, including dopamine, epinephrine, and norepinephrine. Dopamine, in particular, positively influences the brain’s reward system and can enhance cognition.


L-tyrosine is a non-essential amino acid that is widely used as a dietary supplement to increase the production of neurotransmitters such as dopamine. It can enhance cognitive function and therefore improve motivation, mood, and productivity.

L-tyrosine is GRAS (generally recognized as safe) according to The Food and Drug Administration and considered safe in daily 100 mg to 200 mg dosages. It is one of the most popular dietary supplements of recent years with little to no negative side effects.

It is used to increase focus and concentration, as well as boost mood and motivation. Users also claim that l-tyrosine can effectively reduce anxiety and depression. Overall, the main benefits of l-tyrosine include increased productivity, happiness, and energy levels.