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L-Theanine Supplement Review

Natures Trove L-Theanine
Sports Research Suntheanine L-Theanine

Our Review of L-Theanine

Have you ever gone to bed, only to have your brain spin in endless, useless, trivial circles?

Have you ever had trouble focusing on the task at hand?

Have you ever gotten stressed over things and don't know why?

Then you need this supplement.

First, L-theanine allows your brain to slow down and remain quiet. No more “brain drain” going down endless “rabbit holes”. Just clear thoughts.

Second, I use L-theanine daily for my anxiety; it also helps my mood. It has had a great effect and works perfectly for me; and I believe it will work for you, too.

L-theanine is a calming amino acid present in alpha brain-wave production, an index of wakeful relaxation similar to that experienced during and directly after meditation.

Because L-theanine significantly increases alpha waves and promotes relaxation without drowsiness or sedation, it makes it an ideal pathway to achieve the best mental state for, well, most everything.

Basic info on L-Theanine

L-Theanine is the amino acid commonly found in tea leaves, green tea and in some mushrooms. Because of that it is considered very safe and is generally accepted as a valuable supplement by most studies.

It will help your brain functions improve, help increase your attention span, and help enhance your memory; especially when you ingest it with caffeine.

In addition, its calming actions and anxiety relief are enhanced by L-Theanine's upping of nitric oxide production in the body. 

Today, drinking tea still symbolizes psychological calm and contentment for most, and now science is starting to explain the physiological reasons and mechanisms behind these effects.

Several scientific publications including clinical and epidemiological studies are beginning to back up the health benefits of both black and green teas, with particular focus on L-theanine.

Bottom line

L-Theanine has really worked for me.

It is incredibly affordable. And, although I originally decided to try it due to its relatively small price, I'm very pleased that I'm getting the desired results every day.

I take a pill on an empty stomach first thing in the morning just before eating or with my morning coffee. It cuts the caffeine jitters and helps my day go better. I love this supplement and I love how safe it is.

Benefits of L-Theanine


It is used as a stimulant for helping to improve moods and lowering stress. It does this by crossing from the bloodstream to directly target chemicals in the brain.

L-theanine affects the levels of certain chemicals in the brain, such as, serotonin and dopamine, which influence mood, sleep, and emotion; and cortisol, which helps the body to manage active stress.

A change in the combination of these chemicals can alter a person's mood or stress levels.

Alpha brain-wave production typically happens during deep meditation, when sensory inputs are minimized and the mind is generally clear of unwanted thoughts or distractions. However, exciting alpha waves have also shown to boost creativity and alleviate depression. L-Theanine does both.

Ingesting L-Theanine will help you feel less anxious and less stressed. 

Heart and Overall Health

L-Theanine will help lower your heart rate and blood pressure.

It enhances your immune system against infection, increases the ability to fight cancer, and other tumors.

It brings tremendous value in many areas as it helps eliminate any negative feelings in both mind and body.


Regularly taking L-Theanine supplements will help increase your quality of sleep, as a result of the calmness, clearing of the mind, and overall improvement in mood it brings.

Pros and Cons of L-Theanine


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    It is proven to be non-toxic to your body, even if taken in high doses
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    It acts directly on the chemicals in the brain
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    It is fast acting & doesn’t remain for long in the bloodstream before being ejected from the body
  • L-theanine increases the ability to fight cancer & and other tumors
  • L-theanine can boost the effectiveness of chemotherapy drugs


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    It may not function well when used with some other drugs
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    It can interfere with the function of some stimulant drugs in the bloodstream
  • It could lower your blood pressure below safe zones – check with your physician

Suggested Dosages and Use

L-Theanine seems most effective at lowering symptoms of stress and anxiety with dosages of a minimum of 200 mg, one to two times daily.

Good results for some people have shown up same day or in a few days, for others it might be a week or two. This will always vary from person to person and dosage taken, so always allow at least 30 days to see full potential.

In summary

L-Theanine is a wonderful Supplement that can not only help in the relief of stress, anxiety, and depression, but also has many valuable attributes for both body and mind.

Have you been searching for suitable products on the internet or social media?

When you finally decide on a supplement, how do you know which of the many choices available is the Best to choose?

Allow us to aid your search by introducing the top two L-Theanine products that we have tried and know they work.

Here are the two Top-Rated Brands that we recommend and have found to be the Best



Our Rating

Natures Trove L-Theanine
Nature's Trove
  • Promotes relaxation without drowsiness
  • Restores a sense of calm
  • Found naturally in green tea

4.6 out of 5

Sports Research Suntheanine L-Theanine
Sports Research Suntheanine L-Theanine
  • Features the Award Winning Ingredient Suntheanine
  • Increases Alpha brain waves 
  • Non-GMO & Gluten Free

4.4 out of 5

Our Conclusions

In our Review of L-Theanine, we found it to be a wonderful supplement with many benefits in addition to reducing stress and anxiety.

We believe it would be a great addition into anyone's daily regimen of the Best Supplements for Health and Life.