Overview

SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
USERS' SCORE
Good
Based on 16 Reviews
8.8
Supplement Facts
Serving Size: 1 Veg Capsule
Amount Per Serving
%DV
L-Theanine
100 mg
**
Decaffeinated Green Tea (Camellia sinensis) (Leaf)
250 mg
**

Top Medical Research Studies

This study explored how L-theanine can influence the effects of cuprizone-induced multiple sclerosis in mice.

We observed that when L-theanine was administered alongside cuprizone, it improved locomotor functions and reduced damage typically caused by the disorder.

Notably, mice receiving L-theanine showed enhancements in ambulation and grip strength compared to the control group.

While the study indicates potential benefits of L-theanine, further research is necessary to fully understand its effectiveness in human autoimmune conditions.
Read More

Most Useful Reviews

9
Reduced anxiety
It works from stress. L-Theanine with Green Tea is intended to reduce stress and side effects. Together with caffeine, it soothes and invigorates. I noticed a real effect on myself: it gives strength, improves my mood, and fear no longer bothers me as much as before. Once, I took theanine before a driving test, and remarkably, the fear diminished, allowing my mind to be clearer. As a result, I passed! I want to order more, as I find it truly beneficial.
Read More
9.5
Stress reduction
L-Theanine is a unique amino acid found mainly in tea plants and is shown to reduce stress, improve sleep quality, and lessen symptoms of PMS. I take 100mg before bed, and my sleep has greatly improved; I now recall my dreams vividly, indicating deeper sleep. For those with metabolic disorders or sleep issues, I recommend L-Theanine, as it's crucial for sleep recovery. It synergises well with melatonin.
Read More
9.5
Mental stability
As someone who has battled severe sleep disorders for years, I managed to stop my medication with the help of iHerb's melatonin and theanine. This product has demonstrably aided my sleep and mental stability. The delightful aroma of decaffeinated green tea adds to its appeal. The tranquil effects are noticeable both day and night, sharpening my focus, even when paired with coffee. It's an excellent product, albeit slightly pricey.
Read More

Medical Researches

SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
  • All Researches
This study explored how L-theanine can influence the effects of cuprizone-induced multiple sclerosis in mice.

We observed that when L-theanine was administered alongside cuprizone, it improved locomotor functions and reduced damage typically caused by the disorder.

Notably, mice receiving L-theanine showed enhancements in ambulation and grip strength compared to the control group.

While the study indicates potential benefits of L-theanine, further research is necessary to fully understand its effectiveness in human autoimmune conditions.
Read More

User Reviews

USERS' SCORE
Good
Based on 16 Reviews
8.8
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9
Reduced anxiety
It works from stress. L-Theanine with Green Tea is intended to reduce stress and side effects. Together with caffeine, it soothes and invigorates. I noticed a real effect on myself: it gives strength, improves my mood, and fear no longer bothers me as much as before. Once, I took theanine before a driving test, and remarkably, the fear diminished, allowing my mind to be clearer. As a result, I passed! I want to order more, as I find it truly beneficial.
Read More
9.5
Stress reduction
L-Theanine is a unique amino acid found mainly in tea plants and is shown to reduce stress, improve sleep quality, and lessen symptoms of PMS. I take 100mg before bed, and my sleep has greatly improved; I now recall my dreams vividly, indicating deeper sleep. For those with metabolic disorders or sleep issues, I recommend L-Theanine, as it's crucial for sleep recovery. It synergises well with melatonin.
Read More
9.5
Mental stability
As someone who has battled severe sleep disorders for years, I managed to stop my medication with the help of iHerb's melatonin and theanine. This product has demonstrably aided my sleep and mental stability. The delightful aroma of decaffeinated green tea adds to its appeal. The tranquil effects are noticeable both day and night, sharpening my focus, even when paired with coffee. It's an excellent product, albeit slightly pricey.
Read More
9.5
Effective for sleep
For years, I suffered from severe sleep disorders and relied on potent sleeping pills. After deciding to stop all medication, I used iHerb's melatonin and this theanine, which proved effective for sleep and stability. The 100mg version, with its green tea leaves and soothing scent, is my favourite. The calming effects manifest not just during sleep but also help improve daytime concentration. Though pricey, it's a worthwhile investment for its benefits.
Read More
10
Calmness after use
Working in retail, I often encounter rudeness, and I discovered that theanine has been a lifesaver. I take it only when necessary and feel a noticeable calmness within 20 minutes, allowing me to forget my troubles. My resentment and anxiety dissipate, resulting in deep, peaceful sleep. I have experienced no gastrointestinal issues. I will certainly order more.
Read More

Frequently Asked Questions

An autoimmune disorder occurs when the body's immune system mistakenly attacks its own healthy cells and tissues, believing them to be foreign invaders, such as bacteria or viruses. This reaction can lead to inflammation, tissue damage, and impaired function of the affected organs. There are over 80 known autoimmune diseases, including rheumatoid arthritis, lupus, multiple sclerosis, and type 1 diabetes, each with its own specific symptoms and treatment options. The exact cause of these disorders is still unclear, but a combination of genetic, environmental, and hormonal factors is believed to play a role in their development.

Diagnosis of autoimmune disorders often involves a combination of physical examinations, assessment of symptoms, blood tests, and imaging studies to evaluate organ involvement. Treatment typically focuses on managing symptoms and controlling the immune response using medications such as corticosteroids, immunosuppressants, and biologics. In addition to medication, lifestyle modifications, such as stress management and a balanced diet, can be beneficial in managing symptoms. If you suspect you have an autoimmune condition, it's important to consult a healthcare professional for proper evaluation and tailored treatment options.

L-theanine is a naturally occurring amino acid most commonly found in tea leaves, particularly green tea, and is known for its potential calming effects. While caffeine can lead to increased alertness and focus, L-theanine promotes relaxation without causing drowsiness, making it a popular supplement among those seeking to enhance their mental performance while also managing stress. It is believed to work by influencing the production of neurotransmitters, such as serotonin and dopamine, which can positively affect mood and cognitive function.

Many users report that L-theanine may enhance the benefits of caffeine, leading to improved focus and reduced feelings of jitteriness when consumed together. This unique combination is often sought after by students and professionals during periods of intense concentration or study. As a dietary supplement, L-theanine is available in various forms, including capsules, powders, and tea, allowing individuals to choose the method that best fits their lifestyle. Typically, dosages range from 100 to 400 mg per day, depending on the intended effects and individual tolerance.

Based on user reviews, the timeline for observing results from L-Theanine supplementation can vary significantly among individuals. Many users report experiencing benefits within a few days to two weeks of consistent use. For instance, one reviewer mentioned that it took them two weeks to see notable improvements in mood and relaxation when they started taking L-Theanine for anxiety and depressive episodes (Read Review). Another reviewer indicated that after a few days of usage, they began to notice the calming effects and felt much more at ease in their daily life (Read Review).

However, not all experiences are the same; some users reported taking L-Theanine for longer periods without noticeable improvement, such as a user who took it for two weeks and did not see any changes while also experiencing stomach discomfort (Read Review). It's important to keep in mind that individual results can vary based on factors like dosage, personal health conditions, and concurrent medications. Therefore, consistent use is recommended, keeping track of any changes to gauge its effectiveness for your specific autoimmune disorder.

L-theanine demonstrates potential benefits for autoimmune disorders, particularly multiple sclerosis, as evidenced by a study conducted on mice. Researchers found that administering L-theanine alongside cuprizone—a compound used to induce multiple sclerosis-like symptoms—improved locomotor functions and mitigated damage typically associated with the disorder. Mice treated with L-theanine exhibited better ambulation and grip strength compared to those in the control group, suggesting that this supplement could play a role in enhancing physical function in the context of autoimmune disorders [1].

However, while these findings are promising, it's important to note that they are based on animal studies. The effects of L-theanine on humans with autoimmune conditions require further investigation. As such, anyone considering this supplement to manage autoimmune disorders should consult a healthcare professional for personalized advice and to discuss potential benefits and risks.

Based on user reviews, many individuals have reported significant improvements in their mental and emotional well-being after using L-Theanine. For example, users have noted a marked reduction in stress and anxiety levels, with one reviewer sharing that taking L-Theanine helped them handle stressful situations better, including during a driving test where their fear diminished markedly (Read Review). Others have highlighted enhanced sleep quality, with one user noting that their sleep became deeper, leading to vivid dreams and an overall feeling of restfulness (Read Review). Additionally, another reviewer claimed that L-Theanine helped them manage severe sleep disorders successfully without the need for stronger medications (Read Review).

However, individual experiences with L-Theanine can vary widely. While some users report instant and noticeable calming effects, such as a sense of tranquility and improved communication skills, others have expressed disappointment after not experiencing any benefits, including stomach discomfort after use (Read Review). It’s essential for anyone considering L-Theanine supplementation to recognize that results can be highly individual, influenced by factors like dosage, personal health conditions, and pre-existing sensitivities.

Based on user reviews, many individuals have found L-Theanine to be effective when combined with other supplements for managing autoimmune disorders. Notably, several users highlight the synergistic effects of L-Theanine with melatonin. For instance, one reviewer shared that combining L-Theanine and melatonin significantly improved their sleep quality and mental stability, allowing them to stop using prescription medication for sleep disorders altogether (Read Review). This blend appears to enhance not only the quality of sleep but also daytime cognitive function and emotional stability, giving users a broader sense of well-being throughout the day (Read Review).

In addition, some users report positive outcomes when taking L-Theanine alongside other supplements such as B-vitamins, contributing to improved mood and anxiety management during stressful situations (Read Review). They indicate that this combination may help enhance the effectiveness of their overall treatment approach, addressing various symptoms associated with autoimmune disorders. However, it’s essential for anyone considering this combination to consult a healthcare professional for personalized advice, as individual responses can vary greatly.

Based on user reviews, there is a consensus that dosages of L-Theanine can effectively vary depending on individual needs, particularly for those dealing with stress or anxiety, conditions often associated with autoimmune disorders. While one user mentions success with 100 mg doses before bed for improved sleep quality (Read Review), others have reported positive effects using higher doses, suggesting that up to 500 mg can be optimal for stress relief (Read Review). Additionally, combinations with other supplements like melatonin have been noted to enhance the calming effects (Read Review).

However, starter doses often range from 100 mg, with users noting effects improving their daily lives and providing a sense of calm (Read Review). Some individuals take higher amounts spread throughout the day, demonstrating a tailored approach to dosing based on personal responsiveness and daily circumstances (Read Review). Ultimately, while users found varying doses effective, many reported that consistency in taking L-Theanine contributes significantly to its benefits in managing stress and anxiety, which is essential for tackling challenges associated with autoimmune disorders.

9.5
Natural antidepressant
I've struggled with anxiety and depressive episodes for 15 years. After taking an SSRI for two years, my doctor advised stopping it, but the symptoms returned worse than before. I tried L-theanine, hoping for a natural solution. To my surprise, it worked wonders, helping me regain my mood. I take two tablets in the morning, one at lunchtime, and another before bed. It relaxes me and improves my mood. It took two weeks to see results, but I highly recommend it for anxiety and depression, alongside B-vitamins and a healthy lifestyle.
8.8
Daily calm achieved
Initially, I didn’t notice effects, but after a few days, I realised this product truly works. I take one capsule half an hour before breakfast, and my day is much calmer now! I used to be very tense at work and home, but now I feel at ease. I’m very pleased with how well L-theanine suits me.
3.5
No improvements seen
I have been taking these for two weeks, but I haven't noticed any improvements. Unfortunately, I also experienced stomach pain while taking them, so I won’t be ordering them again.
9
Reduced anxiety
It works from stress. L-Theanine with Green Tea is intended to reduce stress and side effects. Together with caffeine, it soothes and invigorates. I noticed a real effect on myself: it gives strength, improves my mood, and fear no longer bothers me as much as before. Once, I took theanine before a driving test, and remarkably, the fear diminished, allowing my mind to be clearer. As a result, I passed! I want to order more, as I find it truly beneficial.
9.5
Stress reduction
L-Theanine is a unique amino acid found mainly in tea plants and is shown to reduce stress, improve sleep quality, and lessen symptoms of PMS. I take 100mg before bed, and my sleep has greatly improved; I now recall my dreams vividly, indicating deeper sleep. For those with metabolic disorders or sleep issues, I recommend L-Theanine, as it's crucial for sleep recovery. It synergises well with melatonin.
9.5
Mental stability
As someone who has battled severe sleep disorders for years, I managed to stop my medication with the help of iHerb's melatonin and theanine. This product has demonstrably aided my sleep and mental stability. The delightful aroma of decaffeinated green tea adds to its appeal. The tranquil effects are noticeable both day and night, sharpening my focus, even when paired with coffee. It's an excellent product, albeit slightly pricey.
9.5
Effective for sleep
For years, I suffered from severe sleep disorders and relied on potent sleeping pills. After deciding to stop all medication, I used iHerb's melatonin and this theanine, which proved effective for sleep and stability. The 100mg version, with its green tea leaves and soothing scent, is my favourite. The calming effects manifest not just during sleep but also help improve daytime concentration. Though pricey, it's a worthwhile investment for its benefits.
9.5
Stress relief achieved
It's a fantastic way to cope with stress! This "anti-stress" agent, derived from the amino acid L-theanine in green tea leaves, helps me relax and calm down. Japanese research indicates it can normalise stress-induced pressure and enhances concentration and mood. Although I’ve read that 500 mg is optimal, I personally find 100 mg effective, providing me with a surge of strength and endurance while significantly improving my emotional state. I will undoubtedly order this product again!
10
Calmness after use
Working in retail, I often encounter rudeness, and I discovered that theanine has been a lifesaver. I take it only when necessary and feel a noticeable calmness within 20 minutes, allowing me to forget my troubles. My resentment and anxiety dissipate, resulting in deep, peaceful sleep. I have experienced no gastrointestinal issues. I will certainly order more.
8.8
Stability restored
I have struggled with anxiety disorders, but since discovering theanine, I've found stability. I take three pills daily, and it effectively manages my anxiety and panic. Mixing it with coffee also provides a neurotropic effect. The packaging is convenient, and the pill size is appropriate for taking.
This study explored how L-theanine can influence the effects of cuprizone-induced multiple sclerosis in mice.

We observed that when L-theanine was administered alongside cuprizone, it improved locomotor functions and reduced damage typically caused by the disorder.

Notably, mice receiving L-theanine showed enhancements in ambulation and grip strength compared to the control group.

While the study indicates potential benefits of L-theanine, further research is necessary to fully understand its effectiveness in human autoimmune conditions.

References

  1. Khosravi-Nezhad S, Hassanpour S, Hesaraki S. L-Theanine Improves Locomotor Function in a Model of Multiple Sclerosis Mice. Arch Razi Inst. 2023;78:195. doi:10.22092/ARI.2022.360066.2544
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