L-TYROSINE – the dosage, effects

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L-Tyrosine is considered as non-essential amino acid, since it is manufactured within the human body. So body will take care of balanced level of L-Tyrosine on its own and there is no need of additional intake of this amino acid. But there are few conditions in which there can be added benefits by the supplementation of this amino acid.

The word Tyrosine has its origin in Greek. It means cheese. It is discovered in 1846, from casein which is a cheese protein. Many food sources which are rich in protein contain this amino acid. Some of them are fish, turkey, chicken, almonds, peanuts, milk, avocados, yogurt, cheese, soy products and bananas. Inside the body it is also synthesized from phenylalanine. This amino acid has many roles to play in the body including its part in neurotransmitter production.


Phenylalanine is a amino acid which is responsible for Tyrosine synthesis in the body. Tyrosine has very good property of penetration. So when taken as a supplement, it can cross BBB or blood brain barrier and successfully reach central nervous system. Supplements of tyrosine are available in many forms like capsule, pill and powder.

This is considered as a precursor as well as building block for the production of numerous neurotransmitters in the brain. Neurotransmitters play an important role in communication between neurons and in the generation of signals.

There are a number functions and processes within the body for which Tyrasine is indirectly responsible because it helps in balancing the levels of neurochemicals which can directly influence these functions. Some of them are dopamine, norepinephrine, and Epinephrine.

It also takes part in the synthesis of few additional hormones and chemicals like melanin. Color of the skin and hair are decided by this melanin pigment. Organs like pituitary, adrenal and thyroid glands are responsible for maintaining adequate amount of hormones throughout the body. Tyrosine can influence functioning of these organs. It takes part in the structure building of each and every protein inside the body. It increases catecholamines.

For many of the active compounds in the body Tyrosine acts as a precursor.  It takes part in the making of thyroid hormone Thyroxin. One more unique property of tyrosine is that the method it uses to cross the BBB or blood brain barrier. It follows a carrier method. Structurally larger amino acids like valine, tryptophan, phenylalanine and isoleucine are used as carrier by Tyrosine. By attaching to these molecules, it succeeds in crossing BBB.

So if there are adequate amounts of amino acids mentioned above, then there are more chances of reaching Tyrosine to the brain. So they decide the concentration of the supplement in brain. So, lower concentration of them will result in lessened benefits of Tyrosine supplement.

The reason behind its benefits for the reduction of stress is production of catecholamine by this supplement. When there is stress, there will be release of noradrenaline. This helps in increased energy and enhanced mental power. Along with these it can even stimulate central nervous system.

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