Last update
4/12/2026
Reviewed By
Overview
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 8 Reviews
8.4
Supplement Facts
Serving Size: 1 Veggie Capsule
Serving Per Container: 90
Amount Per Serving
%DV
L-Theanine (Suntheanine®)
150 mg
†
Most Useful Reviews
9
Mental clarity boost
The Japanese have discovered a unique agent that stimulates mental performance - L-theanine from green tea. It activates brain function without causing nervous excitability, promoting calmness and clarity of mind while reducing stress-induced pressure. This has been a revelation for me! After a month of use, my mood and endurance have significantly improved. I take it twice daily, and it causes no discomfort.
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9
Night shift support
6 people found this helpful
This wonderful drug works like magic! I live on a night schedule and often find it hard to calm my brain after a heavy night shift. But these capsules have truly been my escape. Initially sceptical, I've realised how wrong I was to hesitate. Definitely recommended!
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9
Remarkable relaxation
3 people found this helpful
I felt an impressive relaxation in my brain and nerves and gained clarity of mind.
Read More
User Reviews
USERS' SCORE
Good
Based on 8 Reviews
8.4
- All Reviews
- Positive Reviews
- Negative Reviews
9
Mental clarity boost
The Japanese have discovered a unique agent that stimulates mental performance - L-theanine from green tea. It activates brain function without causing nervous excitability, promoting calmness and clarity of mind while reducing stress-induced pressure. This has been a revelation for me! After a month of use, my mood and endurance have significantly improved. I take it twice daily, and it causes no discomfort.
Read More
9
Night shift support
6 people found this helpful
This wonderful drug works like magic! I live on a night schedule and often find it hard to calm my brain after a heavy night shift. But these capsules have truly been my escape. Initially sceptical, I've realised how wrong I was to hesitate. Definitely recommended!
Read More
9
Remarkable relaxation
3 people found this helpful
I felt an impressive relaxation in my brain and nerves and gained clarity of mind.
Read More
9
Cognitive performance boost
Theanine, an amino acid found in green tea, positively impacts brain metabolism. It promotes relaxation without drowsiness while maintaining concentration, increasing alpha wave production and protecting the brain against glutamate toxicity. I typically take it on an empty stomach, either in the morning or evening for better sleep. Good dosage!
Read More
7.5
Stress relief noted
It is not surprising, but it works – it alleviates stress without diminishing brain activity. You’re never left feeling like a vegetable, just a cheerful and professional cucumber. Every problem no longer feels like the end of the world, which is precisely what I required. I will purchase more, as GABA did not have this effect.
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Frequently Asked Questions
9
Mental clarity boost
The Japanese have discovered a unique agent that stimulates mental performance - L-theanine from green tea. It activates brain function without causing nervous excitability, promoting calmness and clarity of mind while reducing stress-induced pressure. This has been a revelation for me! After a month of use, my mood and endurance have significantly improved. I take it twice daily, and it causes no discomfort.
9
Remarkable relaxation
3 people found this helpful
I felt an impressive relaxation in my brain and nerves and gained clarity of mind.
7.5
Alpha state achievement
3 people found this helpful
A potent source of L-Theanine, this supplement helps achieve an alpha state of mind. I take two with my coffee for maximum benefit. It keeps me calm, active, and alert simultaneously!
9
Cognitive performance boost
Theanine, an amino acid found in green tea, positively impacts brain metabolism. It promotes relaxation without drowsiness while maintaining concentration, increasing alpha wave production and protecting the brain against glutamate toxicity. I typically take it on an empty stomach, either in the morning or evening for better sleep. Good dosage!
7.5
Stress relief noted
It is not surprising, but it works – it alleviates stress without diminishing brain activity. You’re never left feeling like a vegetable, just a cheerful and professional cucumber. Every problem no longer feels like the end of the world, which is precisely what I required. I will purchase more, as GABA did not have this effect.
7.5
Improved mood results
4 people found this helpful
I bought this product alongside GABA for my sleep troubles. They do indeed work, but I'd recommend trying one at a time if you're struggling with focus. I felt muddled until noon after taking both, but this product alone seems to lift my spirits the following day. The Suntheanine form is allegedly more potent, and I believe it works wonders. I highly recommend it.
