You may have heard of L-Tyrosine that was first discovered in 1846. The word has its roots in the Greek word for cheese- ‘tyros’. At some point, you may have come across its numerous other names such as Tirosina, Acetyl-L-Tyrosine, 2-amino-3-(4-hydroxyphenyl) Propionic Acid, N-Acetyl-L-Tyrosine, N-Acetyl-L-Tyrosine. But most of us do not know what it actually is other than the fact that it is some form of a chemical compound. So let us see what L-Tyrosine is all about and why we should all know about it.

What Is It?

L-Tyrosine is, of course, a chemical compound, with the chemical formula C9H11NO3 and IUPAC ID- Tyrosine. It is one of the twenty-two amino acids produced by our body. This nonessential amino acid, on the other, hand is produced by another amino acid known as phenylalanine. For a protein to be formed in our body, L-Tyrosine is extremely essential as it serves as the key ingredient. It is also used in the production of noradrenaline and dopamine in the body. It is also a form of fat burner and nootropic. Whenever we are under stress, lacking sleep or simply sick, our body is not able to properly make some amino acids including L-Tyrosine.

Also L-Tyrosine is stimulatory in nature and may as well interact, theoretically, that is, with other stimulatory supplements and pharmaceuticals.

Where Else Is It Found?

L-Tyrosine can also be found in many food products like wheat, oats, nuts, bananas, cheese, lima beans, chicken and dairy products like eggs, meat and fish.

Phenylketonuria (PKU)

Phenylketonuria (PKU) is a disorder that is genetically inherited. The bodies of people who suffer from this order are unable to process phenylalanine as a result of which their bodies cannot synthesize L-Tyrosine. Thus, these people have to take L-Tyrosine as a protein supplement so that the body does not suffer from the lack of this amino acid.

Why Else Is It Taken?

However, the utility of this protein builder does not end here. The following are a list of ailments and disorders for which L-Tyrosine is being tried as a possible cure:

  • Attention Deficit-Hyperactivity Disorder (ADHD)
  • Attention Deficit Disorder (ADD)
  • Depression
  • Alzheimer's Disease
  • Chronic Fatigue Syndrome(CFS)
  • Narcolepsy
  • Parkinson's Disease
  • Premenstrual Syndrome (PMS)
  • Help in Cocaine Withdrawal
  • Help in Alcohol Withdrawal
  • Heart Disease
  • Stroke
  • Loss of Interest in Sex
  • Erectile Dysfunction
  • Schizophrenia
  • Dementia and many others

However, this is how it fares so far when taken for the given problems:


  • PKU. People suffering from it can take 6 grams of this per 100 grams of protein
  • Improving mental performance
  • Improving alertness in cases when people have lack of sleep
  • Improving memory

Not Very Effective

  • When orally taken for ADD and ADHD
  • Depression
  • Performance while exercising

Can’t Say For

  • Chronic Fatigue Syndrome (CFS)
  • Alzheimer's Disease
  • Premenstrual Syndrome (PMS)
  • Parkinson's Disease
  • Erectile Dysfunction (ED)
  • Heart Disease
  • Schizophrenia
  • Dependence on Cocaine
  • Alcoholism

Other Benefits

  • L-Tyrosine is also used to reduce wrinkles in the skin.
  • Plus, it also improves the cognitive function of people who suffer from inadequate cognitive function due to sleep deprivation. It helps in this without having a considerable affect in the sleep function. Basically L-Tyrosine helps in matters of human productivity.
  • It helps in keeping a good mood and is also known to reduce social anxiety and improve confidence levels in people, making it a useful Geniux ingredient.
  • It also contributes in better workout sessions as it prolongs exercise in heat. If it is taken in higher doses, it affects the metabolism of the person facilitating weight loss.

How Does It Do What It Does?

  • The reason why L-Tyrosine is useful in mental disorders is because it is used in making chemical messengers which affect the brain and the level of mental activity and alertness.
  • Since it produces noradrenaline, it is effective for people with chronic stress problems as stress reduces the level of noradrenaline. L-Tyrosine increases the levels of catecholamine neurotransmitters which are reduced by taking too much stress. It may also prevent memory deficits which are a result of taking too much stress.
  • It is plays an important role in the production process of T3 and T4, which are thyroid hormones. Hence it is necessary for the proper functioning of the thyroid gland the absence of which lead to low thyroid levels which in turn are causes of decreased libido, fatigue, memory loss and fatigue.


  • People with an extremely active thyroid should be careful about L-Tyrosine as it raises the production of thyroid hormone.
  • It may also prevent the uptake of gut of certain drugs which resemble closely amino acids like levodopa.

It may negatively interact with some other stimulants, drugs or supplements which are stimulatory in nature as well, especially so with drugs which affect the production of norepinephrine and dopamine.

It is also known to increase the blood pressure of people taking Monoamine Oxidase Inhibitors (MAOIs) which are antidepressants.

Some Other Side Effects

  • Overstimulation
  • Insomnia
  • Anxiety
  • Restlessness
  • Rapid heartbeats or heart palpitations

The Intake of L-Tyrosine

  • It is to be taken in doses of approximately 500 to 2000mg about half an hour or an hour before any activity which may cause acute stress like exercise.
  • If the aim is to increase alertness without getting proper sleep for a long time, 150 mg per kg per day of tyrosine would be helpful.

Please Note

There are no studies which focus on the affects of L-Tyrosine on the health of mother and baby during pregnancy and breast-feeding. Thus, it is better not to take its doses to be on the safe side of the equation.

For more information about tyrosine or before taking the decision of having Tyrosine supplements it is always better to consult a physician who will be able to be a better guide and would have a better understanding of individual problems.