L-theanine is an amino acid found naturally in the environment and known for boosting energy levels as well as reducing anxiety in humans. For centuries, it has been used in Chinese medication. In addition, there have been reports of wide-ranging research that have been performed.  It was first derived in 1949, using green tea.

It has been recognized for increasing lifespan and enhances the functions of central nervous system. Additionally, it also improves mental abilities like focus, awareness, etc. Its efficiency increases when it is consumed along with caffeine.

Before taking l-theanine, it would be better to gain some information, so as to avoid any kind of side-effects.



It has the ability to go through the blood brain barrier that guards the brain and causes an optimistic effect. The l-theanine effects on the brain consist of enhancing and regulating the production of alpha waves. This triggers a calming and relaxing feeling all through the body and mind.

  • It stimulates the production of Serotonin, which controls the sleep cycles of a body.
  • It increases the levels of Dopamine in brain and improves the immunity system.
  • It has also shown positive results in cancer patients during chemotherapy as it improves the focus of chemo drugs on the cancer cells without affecting the normal ones.



It has high absorption rate in terms of blood and acts swiftly on the central nervous system. It operates by influencing different types of neurotransmitters such as dopamine, serotonin, GABA, etc. Thus, it is responsible for enhancing mental functions of the brain, sleep cycles, and mood enhancement.


  • Its first and foremost benefit is the generation of the feelings of relaxation and calmness in a person.
  • L-theanine neutralizes the effects of caffeine such as overexcitement and anxiety.
  • Along with this, it also acts as an anti-oxidant and improves the health of the heart
  • It also enhances the production of nerve growth

Whenever you decide to use l-theanine, remember to begin with low dosage. You can even take advice from your physician on this matter.

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Horace Higgins