Sebastian Freidank - 18. July 23

L-Theanine Effect – Concentration, Sleep, Depression and Caffeine


The L-theanine effect is extremely exciting in many ways! Especially in combination with caffeine, L-theanine unfolds a grandiose effect! But also on sleep, as well as depression, L-theanine can have a positive effect.

In this article, we want to focus on the effects of L-theanine so that you can understand exactly what benefits this exciting amino acid has and how you can use it for yourself.


Video Summary


  1. What is L-theanine?
  2. Where is theanine contained?
  3. L-theanine effect
    1. General use of L-theanine
    2. Concentration – L-theanine effect
    3. L-theanine Effect on sleep
    4. L-Theanine Effect on Stress
    5. Immune system
    6. L-theanine Effect in depression
    7. Blood pressure
  4. Effect L-theanine and caffeine
  5. L-Theanine Dosage
  6. Side effects of L-theanine
  7. Conclusion

1. What is L-theanine?

L-theanine is a non-proteinogenic amino acid. It is therefore not incorporated into the body as a protein. The amino acid acts in the brain and is therefore some of the few that can pass through the brain-blood barrier. The effect of L-theanine is described as relaxing, reducing stress and anxiety as well as improving sleep. More on the effect later.


2. Where is theanine contained?

Rarer than gold, you could almost say, because L-theanine occurs only in two plants and one fungus. At least no other source has been found so far.

For a pure L-theanine powder, therefore, as withCaffeine also perform an extraction. Meanwhile, you can also use pure L-theanine directly at Buy Amazon.

Where is L-theanine contained?


3. L-theanine action

3.1. General use of L-theanine

Because L-theanine has a relaxing effect, many people use it to reduce stress or to reduce anxiety and depression. L-theanine is often taken in dissolved form as tea or as an extract.

It should also increase mental performance and attention and lead to increased focus. In addition, it should have a blood pressure regulating effect and improve the quality of sleep.

Let's take a closer look at the aforementioned effects of theanine.

3.2. Concentration – L-theanine effect

Taking L-theanine is supposed to improve concentration and learning ability. This can be beneficial before an important test or during demanding mental work. In the case of a Study the effect of L-theanine on cognitive abilities could already be determined after a single intake that the subjects performed faster and with fewer errors in reaction tests. The study after 12 weeks to the conclusion that attention, memory capacity of the brain and executing processes are positively influenced.

This effect is one reason why L-theanine is becoming an increasingly popular Nootropics will. Theanine works most efficiently together with L-theanine, theobromine and theophylline, which you can all find in balanced amounts in Guayusa find.

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3.3. L-Theanine Effect on Sleep?

One study looked at the effect on our sleep. A 2011 Study conducted shows that L-theanine induces deeper and more relaxed sleep. After six weeks of taking 2x daily 100 mg of L-theanine, the sleep behavior of the participants improved.

A further study showed that 200 mg to 400 mg significantly improved sleep in both humans and animals.

Further studies showed that lower heart rate in resting mode of the subjects as well as a better sleep quality of ADHD boys.


3.4. L-theanine effect on stress

Investigations L-theanine has a calming effect on the mind without making you sleepy. In addition, the amino acid should help to reduce stress and anxiety in stressful situations reduce.


L-Theanine Effect Overview


3.5. Immune system

The decline in Respiratory diseases and Intestinal infections could be detected in a study on L-theanine in beverages.


3.6. L-theanine effect in depression?

Similar to studies on anxiety and stress, studies in patients with chronic depression Resultthat L-theanine has a soothing effect.


3.7. Blood pressure

In the case of a 2012 study on the effect of L-theanine in people who were prone to high blood pressure in stressful situations, it could be observed that the intake of approximately 200 mg L-theanine in advance lowered the blood pressure of the subjects.

Five other studies, which reviewed the intake of L-theanine at regular intervals, also led to these blood pressure lowering results.

In two Japanese studies a remarkable L-theanine effect could be observed. L-theanine has been shown to cause a decrease in blood pressure only when there is a problem, but not when no stress causes an increase. L-theanine can therefore be Blood pressure regulator are described as sinking.


4. Effect L-theanine and caffeine

The combination of L-theanine and Caffeine has often been studied in studies and showed a better Attentionand ability to solve the tasks set. The Participants also felt more relaxed and alert. I'm sorry. I'm sorry.

In general, attention, mood, memory and reaction seem to be clearly improved are.


Effect L-theanine and caffeine


5. L-Theanine Dosage

There is no official dosage recommendation for L-theanine, however, it can be quickly deduced from the studies that a daily dose of 200 mg to 400 mg has an efficient and positive effect. This dose can be taken for 4 to 6 weeks or longer.

Of course, if you tend to start a self-experiment, we recommend that you inform your doctor and ask for advice and more information.


6. Side effects of L-theanine

No L-theanin side effects have been known to date. An intake as a supplement of 900 mg daily was tested in studies for 8 weeks. This is, of course, not a medical recommendation. Contact your doctor and inform yourself in detail.

Guayusa Tea contains both L-theanine and caffeine, this combination is one of the reasons why Guayusa Tea no known Adverse reactions . You can find additional information about the caffeine Benefits and the Handicaps in our linked articles. An overall overview of the active substances in Guayusa you will find here and you can make an overall picture of the effect.


7. Conclusion

L-Theanin is an ingenious active ingredient with a grandiose effect that can help against stress, anxiety and depression. But not only that, L-Theanin improves sleep and cognitive skills-according to the study situation.

The effect is therefore not only for professional Biohacker, but also for students, self-employed people and all who are often exposed to stressful situations and mental challenges.

In combination with caffeine and other active substances such as Theobromine and Theophylline L-Theanin can develop a synergetic effect.

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