Mood Support





Boost Energy
Bulk Powder
Heart Health
Improve Memory
Mental Health
Mood Support



In humans, tyrosine helps the brain build neurotransmitters known as catecholamines, which include dopamine, norepinephrine and epinephrine. [1]

L Tyrosine Benefits and Effects

Improving Working Memory

Tyrosine supplements can help replenish neurotransmitters necessary for maintaining working memory. [2] Therefore, some students like to take L tyrosine for studying.

Assisting the Thyroid

In studies of rats with thyroid deficiencies, subjects given tyrosine supplements performed better on cognitive tasks. [3]

Boosting Dopamine Levels

Taking tyrosine may also increase dopamine production when needed; however, the effect is temporary since taking L tyrosine in high doses can slow neuronal firing. [4]

Improving Stress Resistance

Rats who were given tyrosine injections before being subjected to electric shock maintained consistent norepinephrine levels and demonstrated no resulting cognitive deficits. [5]

Managing Attention Deficit Disorders

In one study testing the link between L tyrosine and ADHD, eight of 12 patients saw improvements following two weeks of tyrosine supplementation. However, those patients developed a tyrosine tolerance after six just weeks, so more research is needed on L tyrosine and ADD. [6]

Treating Depression

In several small scale studies, tyrosine decreased symptoms of depression better than a placebo. [7] A larger study yielded mixed results, but the researchers posited that tyrosine is likely most effective at treating depression stemming from dopamine and norepinephrine deficiencies. [8]

Treatment of Parkinson’s Disease

Since Parkinson’s affects dopamine-producing neurons, tyrosine could help prevent progression of the condition. [9]

Increased Inhibition

In a study of humans, subjects given tyrosine injections performed better on a stop-signal task than a control group. [10]

How L Tyrosine Works

L Tyrosine

The human body naturally produces tyrosine as a precursor to dopamine, norepinephrine and epinephrine. Thus, taking L tyrosine nootropic supplements can help the brain replenish these neurotransmitters as they get used up. [1]

L Tyrosine Energy

Tyrosine may only improve physical or cognitive performance in circumstances where catecholamine levels are being depleted. [12]


Standard dosing has yet to be established, but online L tyrosine reviews suggest taking 500-2000mg prior to an acute stressor. For best results, tyrosine should be taken 30-60 minutes before exercising or performing a mentally demanding tasks. It can be taken 2-3 times per day.

Side Effects

Taking L tyrosine long term appears to be safe for adults, but it’s not recommended to take L tyrosine during pregnancy. You should also avoid mixing L tyrosine and alcohol.

Unwanted weight gain as well as stiffness in the shoulders and neck have also been reported. [13]

L Tyrosine Drug Interactions

While L tyrosine has shown promise for treating Parkinson’s disease, it can interfere with some Parkinson’s treatments. [14] Likewise, although some people take L tyrosine for thyroid hormone production, combining tyrosine supplements with thyroid hormone pills can actually lead to hyperthyroidism. [15]

Ask your doctor about L tyrosine’s interactions with other medications you’re currently taking.


Taking tyrosine along with the tryptophan supplement 5-HTP can help combat depression since 5-HTP boosts serotonin, another neurotransmitter that affects mood. [13]

Additional information

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Also known as:Tyrosine or L-Tyrosine
Type:Amino Acid
Good for: , , , , , , ,
Stacks well with: Choline Bitartrate,Vitamin B12,L-Theanine Capsules,Triacetyluridine (TAU),Caffeine,Aniracetam,Tianeptine Sodium,GW501516,Hordenine,Aniracetam Capsules,L-Theanine,Zinc Gluconate,Phosphatidic Acid,Glucosamine Sulfate Potassium,L-Citrulline Malate,Conjugated Linoleic Acid (CLA),DHA Softgels,Uridine,Caffeine Citrate,Avena Sativa,Spirulina,Cordyceps Mushroom,PRL-8-53,Nootropics Sampler,Adrafinil,Magnesium Bisglycinate Chelate,St. John’s Wort (Hypericum perforatum),Guarana,Etizolam,Phenylpiracetam,Piracetam,L-Arginine,Coluracetam,Broccoli Sprout Extract,Alpha GPC,Pramiracetam,Theacrine (Teacrine),Tribulus Terrestris,Piperine Black Pepper,Lion’s Mane Mushroom,Taurine,Milk Thistle,Valerian Root,DMAE Bitartrate,DHEA,Methylene Blue,Sunifiram,Encapsulation Kit,Centrophenoxine,Nefiracetam,ALCAR Capsules,Sulbutiamine,IDRA-21,Agmatine Sulfate,Rhodiola Rosea,Best Nootropic Stack,Sarcosine,Noopept,Semax,Dicaffeine malate,Ethylphenidate,PEA (Phenylethylamine HCL),Instantized BCAA,Shilajit,Modafinil,Vinpocetine,Epicatechin,Theobromine,Melatonin Powder,TUDCA,Rutaecarpine,Guggul Gum Resin,MACA,Quercetin Dihydrate,Raspberry Ketones,Tianeptine Sulfate,Horny Goat Weed,GABA,Picamilon,Turmeric,Dihydromyricetin,Phenibut,Cissus Quadrangularis,Mucuna Pruriens,Creatine,Artichoke Extract and Forskolin,Tianeptine Oxalate,D Aspartic Acid,Chromium Picolinate,ALCAR,Fasoracetam,Tongkat Ali,Oxiracetam,Ashwagandha,Huperzine A,Magnesium Citrate,Synephrine,5-HTP,Methylsulfonylmethane,Yohimbine
Typical dose:500 - 2000 mg
Half Life :4 Hours