Last update
5/7/2026
Reviewed By
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Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
USERS' SCORE
Moderately Good
Based on 55 Reviews
7.3
Supplement Facts
Serving Size: 1 Veg Capsule
Amount Per Serving
%DV
L-Theanine
200 mg
*
Inositol
100 mg
*
Top Medical Research Studies
7
L-theanine improves sleep quality safely
We examined whether L-theanine, a natural amino acid found in tea, could improve sleep quality, especially for individuals affected by sleep apnea. Through various sleep assessments and questionnaires, we found that taking 200 mg of L-theanine before bedtime offers benefits not by putting one to sleep, but by easing anxiety.
This means users can experience better sleep without the sedative side effects commonly associated with traditional sleep aids. Importantly, L-theanine should not cause daytime drowsiness, making it a versatile option any time of the day.
This means users can experience better sleep without the sedative side effects commonly associated with traditional sleep aids. Importantly, L-theanine should not cause daytime drowsiness, making it a versatile option any time of the day.
Read More
Most Useful Reviews
9
Pain relief
17 people found this helpful
I used to wake up with jaw aches, and my dentist informed me that I was clenching my teeth in my sleep, affecting my teeth. Since I began taking 400 mg of L-Theanine before bed, I no longer experience any pain!
Read More
9
Effective sleep aid
9 people found this helpful
After switching from glycine to theanine, I found it effective. I took it 30 minutes before bed, resulting in deep, comfortable sleep. I still have glycine left but it was less effective for me.
Read More
9
Quality enhancement
8 people found this helpful
Initially, I only took GABA and melatonin for sleep, but I added theanine to avoid waking in the night. Now, I sleep soundly without interruptions, which has vastly improved my sleep.
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
- All Researches
7
L-theanine improves sleep quality safely
We examined whether L-theanine, a natural amino acid found in tea, could improve sleep quality, especially for individuals affected by sleep apnea. Through various sleep assessments and questionnaires, we found that taking 200 mg of L-theanine before bedtime offers benefits not by putting one to sleep, but by easing anxiety.
This means users can experience better sleep without the sedative side effects commonly associated with traditional sleep aids. Importantly, L-theanine should not cause daytime drowsiness, making it a versatile option any time of the day.
This means users can experience better sleep without the sedative side effects commonly associated with traditional sleep aids. Importantly, L-theanine should not cause daytime drowsiness, making it a versatile option any time of the day.
Read More
User Reviews
USERS' SCORE
Moderately Good
Based on 55 Reviews
7.3
- All Reviews
- Positive Reviews
- Negative Reviews
9
Pain relief
17 people found this helpful
I used to wake up with jaw aches, and my dentist informed me that I was clenching my teeth in my sleep, affecting my teeth. Since I began taking 400 mg of L-Theanine before bed, I no longer experience any pain!
Read More
9
Effective sleep aid
9 people found this helpful
After switching from glycine to theanine, I found it effective. I took it 30 minutes before bed, resulting in deep, comfortable sleep. I still have glycine left but it was less effective for me.
Read More
9
Quality enhancement
8 people found this helpful
Initially, I only took GABA and melatonin for sleep, but I added theanine to avoid waking in the night. Now, I sleep soundly without interruptions, which has vastly improved my sleep.
Read More
9
Anxiety relief
7 people found this helpful
Following self-isolation, I faced anxiety and irritability. After taking this supplement, I felt a swift reduction in anxiety symptoms within 10-15 minutes, improving my overall well-being.
Read More
9
Better sleep
7 people found this helpful
I struggled with sleep for a long time, waking up after only two hours. After two weeks of taking this, I began to sleep properly and feel much better overall.
Read More
Frequently Asked Questions
9
Better sleep
7 people found this helpful
I struggled with sleep for a long time, waking up after only two hours. After two weeks of taking this, I began to sleep properly and feel much better overall.
9
Anxiety relief
7 people found this helpful
Following self-isolation, I faced anxiety and irritability. After taking this supplement, I felt a swift reduction in anxiety symptoms within 10-15 minutes, improving my overall well-being.
9
Improved sleep quality
1 people found this helpful
Helped me sleep. I've been struggling with sleep apnea for a while. Since using this product for two weeks, I've noticed significant improvement. Even if I wake up, I quickly fall back asleep. As a middle-aged woman, I highly recommend this to others.
9
Consistent sleep
5 people found this helpful
I've struggled with sleep issues for years and found L-Theanine to be a game changer. Now, I regularly sleep through the night without waking up, which I rarely did before.
9
Pain relief
17 people found this helpful
I used to wake up with jaw aches, and my dentist informed me that I was clenching my teeth in my sleep, affecting my teeth. Since I began taking 400 mg of L-Theanine before bed, I no longer experience any pain!
9
Quality enhancement
8 people found this helpful
Initially, I only took GABA and melatonin for sleep, but I added theanine to avoid waking in the night. Now, I sleep soundly without interruptions, which has vastly improved my sleep.
9
Deep sleep promotion
2 people found this helpful
These supplements helped me transition from dangerous benzodiazepine sleeping pills to natural sleep. I combined 400-800mg of L-theanine with taurine and tryptophan, which allowed me to recover my ability to sleep deeply without drugs.
7
L-theanine improves sleep quality safely
We examined whether L-theanine, a natural amino acid found in tea, could improve sleep quality, especially for individuals affected by sleep apnea. Through various sleep assessments and questionnaires, we found that taking 200 mg of L-theanine before bedtime offers benefits not by putting one to sleep, but by easing anxiety.
This means users can experience better sleep without the sedative side effects commonly associated with traditional sleep aids. Importantly, L-theanine should not cause daytime drowsiness, making it a versatile option any time of the day.
This means users can experience better sleep without the sedative side effects commonly associated with traditional sleep aids. Importantly, L-theanine should not cause daytime drowsiness, making it a versatile option any time of the day.
References
- Rao TP, Ozeki M, Juneja LR. In Search of a Safe Natural Sleep Aid. J Am Coll Nutr. 2015;34:436. 10.1080/07315724.2014.926153
