L- Theanine Review : Benefits of L-theanine And its Possible Side Effects

a cup of tea

L-Theanine is mostly available in the leaves of black, green, and white tea leaves. L – Theanine as nootropic supplement has grown in popularity. This is due to it’s affordable price and also partly  due the amazing benefits of l – theanine .

Besides water, tea is the most often consumed beverage worldwide. Both black, white, and green tea feature an original amino acid known as L-Theanine. This amino acid has been found to change aspects of the human brain. With new progress in modern science and a rich history, we’re unlocking the benefits of this amino acid, L- Theanine.

In comparison, essential amino acids are the ones that are responsible for assembling protein molecules. Although L-Theanine is not considered an essential amino acid, it still plays a valuable role within the body.

When it comes to its structure, L-Theanine is comparable to the neurotransmitters glutamate and GABA. It’s been discovered to have various benefits including mood enhancement, cognition, and relaxation.



l theanine benefits

Historical China utilized the advantages of tea as far back as the 3rd century AD. Tea has made it’s way into various cultures, across thousands of years. Green tea is a known element within the culture of Buddhism. Buddhist monks have long consumed green tea in order to stay alert.

It’s been used for the health benefits, religious practices, as a symbol of wealth.

But when did L-Theanine begin influencing the sphere of cognitive neuroscience?

As a part of green tea, L Theanine was discovered in 1949. A year afterwards, L-Theanine was successfully expressed from a gyokuro leaf within a Japanese  laboratory.

Today, it’s popularity is growing. Many are loving the positive effects  which this compound offers.


L-Theanine, when normally taken, reaches  the mind inside an hour. The effects of L-Theanine peak at about 5 hours, then levels begin to fall. After 24 hours, no concentration of L Theanine will be present. More importantly, no chemical dependence will result from consuming this material.

L Theanine is successful by itself, but many users would rather take L Theanine in a stack with other known enhancers; caffein and Piracetam.

A ratio of one part caffein to two parts L-Theanine is believed to work. Alertness and focus increases, while the L-Theanine combats the negative side effects related to caffeine



Through medical studies, it has been discovered that L-Theanine efficiently crosses the blood brain barrier. This implies that drugs or a supplement can interact directly with the brain. In turn, cognition is improved. It has additionally been proven to increase one’s consciousness, and create a feeling of relaxation.

L-Theanine works with various neurotransmitters creating desired effects. When discharged GABA for example, creates a feeling of relaxation  within the body. Serotonin helps regulate one’s mood.

When caffeine and L-Theanine are taken collectively, focus can be improved through caffeine, while reducing levels of anxiety through L- Theanine. This is a power powerful stack that enhances congnition while improving memory.



a man meditating

There are numerous L -Theanine benefits such as; a reduction in heart rate, decreasing blood pressure, and supporting immune function by raising T-cells.

Through research, scientists have discovered various benefits related to brain function when consuming L Theanine. Some Significant benefits include:

  • A favorable affect on stress levels, both mental and physical. This really is associated with a rise in relaxation, creating a calming sensation.
  • Improving cognitive functionality; increased attention span and enhanced memory.
  • Increased control over one.While increasing focus on
  • Enhances learning. Studies have shown that L-Theamine has the ability mute the “mind noise. Consequently, participants could concentrate and focus more effectively.
  • Boosts Alpha wave generation. Alpha waves are in charge of an awake, yet relaxed state.

There have already been many benefits yielded through the combined dosage of both Caffeine and L Theanine. Not only have studies yielded proved it has an efffect when it comes to focus, and memory, mood, but L Theanine has been treated as a possible treatment for Alzheimer’s.


A study, published in the Journal of Nutrition found a correlation between L Theanine and brain function. Sixteen participants took part, with ages ranging from 21-40. This study yielded a considerable development regarding a combined treatment of Amino Acid L-Theanine and caffeine.

There have already been numerous well-respected studies published regarding other favorable effects. There have been studies that have found an increase in cognition and mood; decrease in stress responses; and an increase in attention and memory only to name a few.

An L – Theanine  Review Published At Peaknootropics.com/shopl/l-theanine



L-Theanine continues to be approved by the FDA, being safe for human consumption, which itself suggests that L – theanine side effects are not a thing to be taken seriously. Although you have doses of L-Theanine in your tea, positive effects were seen only when taken in  much bigger doses than your average cup of tea each day.

There have been very few adverse L theanine side effects reported. Nevertheless, within human studies, there have already been instances of tea infusions creating headaches and dizziness. Now, L-Theanine consumption appears to have no danger. Nonetheless, researches is being done to detect the optimum dosage and frequent use is not dangerous if prolonged.

If L Theanine is taken more than the recommended  doses,  could possibly drop your blood pressure to dangerously low levels in conjunction with your pre-existing drug.


L-Theanine dosage is typically taken in 100-200g doses, alongside Caffeine. To find the suitable dose for you need to do some testing but do not exceed the recommended dosage.


Ready to include L Theanine as a supplement to your daily diet?

If you want to buy L Theanine supplements online, we’recommend Peaknootropics where you can buy L – Theanine  legally, safely and easily .You get it at affordable prices even a supply for a whole month won’t cost you much.

Click on the image below to buy L – Theanine from Peaknootropics.