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N-Acetyl L-Tyrosine N-Acetyl L-Tyrosine 120 tab.
Source Naturals
29.16 $

N-Acetyl L-Tyrosine 120 tab.

Servings: 120 tab.
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For free shipping is missing: 81.00 $
29.16 $With VAT
0.24 $ / serving

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  • Improves mood and mental well-being
  • Enhances memory and cognitive functions
  • Eliminates mild symptoms of depression
  • Increases stress resistance
  • Boosts energy and vitality
  • Supports weight loss
  • Supports thyroid functions
  • Increases motivation
  • Facilitates concentration

Source Naturals, N-Acetyl L-Tyrosine is a dietary supplement containing N-acetyl L-tyrosine (NALT), that is the acetylated derivative of the amino acid L-tyrosine.

In order to reinforce the activity of the preparation, its composition also includes pyridoxine and folic acid, which play the important role of cofactors in the reactions the NALT participates in in the organism. Similarly to other amino acids, NALT is the building material of proteins; however it gained the most popularity as an agent with nootropic properties.

N-Acetyl L-tyrosine is a precursor of many chemical compounds responsible for emotional states and higher mental processes, so it is used most often in order to improve the mood and enhance cognitive functions. Moreover, L-tyrosine affects the release of thyroid hormones and can be of help in the case of hypothyroidism. The benefits of NALT can also be used by sportspeople, as the substance is able to reduce fatigue, stimulate the organism, increase physical capacity and support the reduction of body mass.

N-Acetyl L-tyrosine, called NALT in short, is a modified form of the amino acid L-tyrosine. It contains additional acetic acid, thanks to which it is characterised by much higher bioavailability than L-tyrosine itself. It dissolves in water fantastically and is quickly absorbed by the organism. After entering the body, NALT is converted to a free amino acid and then included in various metabolic pathways.

L-Tyrosine is one of the 22 amino acids used by cells to synthesise proteins. It belongs to the group of endogenous amino acids – the organism can produce it on its own; however, the amount is often insufficient for the optimal functioning of the organism. Similarly to other amino acids, NALT is a building material but its main role is the synthesis of crucial neurotransmitters – dopamine, norepinephrine and adrenaline. The substances are responsible for good mental well-being and guarantee good intellectual capacity.

Improvement of mental well-being
NALT is the base for the synthesis of a group of substances called catecholamines (dopamine, adrenaline, noradrenaline) that perform the function of neurotransmitters in the central nervous system.

Under the influence of the enzyme tyrosine hydroxylase, L-tyrosine is transformed into L-DOPA after entering the organism. L-DOPA is of great significance for the organism – it is the very substance from which the most important neurotransmitter, dopamine, is created in the presence of DOPA decarboxylase. L-DOPA crosses the blood-brain barrier easily, so it can even increase dopamine levels inside the brain. Excess dopamine is transformed into noradrenaline – another important neurotransmitter responsible for a number of intellectual processes.

The natural production of dopamine and noradrenaline from NALT is crucial for the overall mental health and a good mood. Dopamine is responsible mainly for mental well-being. Its properly high levels in the organism translate into good humour, energy and high motivation to act. There have also been tests conducted on the influence of NALT on depression – many subjects reported a subjective improvement of their well-being, higher mood and the elimination of anxiety. Dopamine also affects increasing motivation. It helps us to undertake various activities with more enthusiasm, boosts energy and vitality.

L-DOPA created out of L-tyrosine is a precursor of another important chemical compound – melanin. Apart from being responsible for skin pigmentation, melanin exhibits the ability to chelate, that is gather and eliminate harmful heavy metals. Thanks to that, it protects the organism from their negative activity. That also translates into mental well-being; there is more and more reports that the toxicity of heavy metals is one of the greatest threats for health and mental well-being. In many cases, heavy metal toxicity has a negative effect on the mood and its symptoms are identical with those of depression.

Improved cognitive functions
NALT supports mental capacity and improves cognitive functions, which is possible mainly thanks to dopamine, epinephrine and noradrenaline that are produced from it. Dopamine increases motivation and the feeling of optimism, and sharpens the senses. According to many users, supplementing NALT translates into a high level of vitality and clarity of mind. Norepinephrine, another important neurotransmitter synthesised from L-tyrosine, plays the greatest role in drawing conclusions and is crucial for good memory. It affects the ability to learn and reason as well as analytic skills.

The greatest benefits of using NALT have been observed in tests in people exposed to various stressors for a long time. Stress usually leads to the weakening of cognitive functions resulting from reduced levels of dopamine and noradrenaline. The symptoms are tiredness, irritability, problems with concentration and memory. Supplementation with NALT allowed to alleviate the cognitive and physiological effects of stress. The test participants were also able to maintain the right level of concentration, had no problems with memory, assimilating knowledge or expressing logical conclusions.

Balanced catecholamine levels in the brain mean vitality, brilliance and dynamism. The right level of NALT helps to optimise the amount of catecholamines in the organism, which also translates into an improvement in motor control and better reactions to stimuli.

Support for thyroid functions  
A chronically low level of L-tyrosine often leads to hypothyroidism, connected with, for example, metabolism disorders, increased body mass, low mood and energy. Clinical tests have confirmed that supplementation with NALT can support thyroid functions, especially by affecting the hormones secreted by the gland.

L-tyrosine is a precursor of two thyroid hormones – the main hormone T3 (triiodothyronine) and T4 (thyroxine). T4 is not an active form; however it converts into T3, which makes it important as well. There are scientific studies confirming the influence of L-tyrosine on the pituitary gland – L-tyrosine stimulates it to increase the production of the hormones T3 and T4.

The activity of NALT naturally regulates the normal functioning of the thyroid and helps to keep the balance of the hormones produced by it. That translates into the right functioning of the whole organism: a proper level of energy and motivation, normal metabolism and good mental well-being.

NALT for sportspeople and those on slimming diets
N-acetyl L-tyrosine is highly valued in the world of sports. It is a common addition to pre-workout blends. It works as a mild psychostimulant, improves concentration and increases motivation. Additionally, it has a beneficial effect on the organism’s physical capacity and eliminates tiredness.

Some scientists suggest that L-tyrosine can be helpful in reducing fatty tissue. Its activity in that area is believed to stem from the stimulation of the sympathetic and central nervous system, which leads to the release of the hormones that facilitate the process of lipolysis and thermogenesis in the organism. It means that thanks to stimulating the processes by supplementing NALT, it is potentially possible to lose more kilograms than just through the right diet and physical activity.

N-Acetyl L-tyrosine is a high-quality preparation recommended particularly for people who are looking for a safe alternative for synthetic agents that improve the mood and intellectual capacity. It will prove very helpful in states of mental exhaustion and in times of long-lasting tension. An additional benefit of using it is that the functioning of the thyroid becomes better and the organism is protected from the harmful effects of stress.

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Container size: 120 tabletsServing size: 1 tabletServings per container: 120
per 1 tabletamount%DV
Vitamin B-6 (as pyridoxine HCl)25 mg1,250%
Folate (as folic acid)400 mcg100%
N-Acetyl L-Tyrosine300 mg

Other ingrednients

sorbitol, stearic acid, magnesium stearate, modified cellulose gum, and silica.

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Folic acid


Folic acid - also known as vitamin B9, is a synthetic form of naturally occurring folates. It needs to be transformed to folates in order to be biologically active also in the human organism. Therefore, its supplementation is recommended to people who do not have problems with methylation processes.

The majority of people associate folic acid with the period of pregnancy. It is definitely a justified association. Proper supply of vitamin B9 conditions correct development of the fetus and prevents disorders of neural tube defects in a baby.

Supplementation with folic acid also demonstrates positive influence on the functions of the nervous system of adults. Some sources say that it is conducive to maintaining beneficial emotional states. Moreover, folic acid takes part in the process of erythropoiesis, thanks to which it enables efficient production of red cells.

Supplementation with folic acid should be also considered by men who deal with low sperm quality. It was proven that complementing the level of vitamin B9 is conducive to increasing reproductive abilities of men.



Tyrosine - endogenous amino acid (synthesized within the body), one of the 22 protein amino acids building. It occurs naturally in animal food products (eggs, dairy, meat). If the deficiency, it can be synthesized by hydroxylation of phenylalanine, capable of being converted to tyrosine in the liver. It is a precursor of neurotransmitters: dopamine (the group of catecholamines, participating in the processes occurring in the nervous system, causing muscle coordination and participates in the synthesis of many hormones) and noradrenaline (counteracting stress, stimulating the heart and circulatory system, and increasing glycogenolysis and lipolysis participating in the processes of energy transformations). Tyrosine is a precursor of thyroid hormones responsible for the rate of change in metabolic processes and pigment (melanin). In the supplementation, preparations containing tyrosine are used in programs reducing body fat (weight loss), improve mood and are stimulants.
Dosage: Customarily 500-2000 mg per day.


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