Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 4 Researches
7.8
USERS' SCORE
Good
Based on 6 Reviews
8.4
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
8
L-theanine shows potential antidepressant effects
We examined how L-theanine, a compound found in green tea, influences depressive behaviors in a rat model. Using specific behavioral tests, such as the open-field and forced swim tests, we observed that L-theanine improved depressive-like behaviors.
Our findings indicated that it boosted levels of key neurotransmitters—serotonin, norepinephrine, and dopamine—in certain brain regions. This suggests that L-theanine could have potential antidepressant effects, possibly by interacting with these neurotransmitters in brain areas associated with mood regulation.
Our findings indicated that it boosted levels of key neurotransmitters—serotonin, norepinephrine, and dopamine—in certain brain regions. This suggests that L-theanine could have potential antidepressant effects, possibly by interacting with these neurotransmitters in brain areas associated with mood regulation.
Read More
8
We explored the effects of l-theanine, a natural amino acid found in green tea, on patients diagnosed with major depressive disorder (MDD) in an 8-week open-label study. We involved 20 participants who took 250 mg of l-theanine daily in addition to their regular medication.
Our findings indicated a significant reduction in depression and anxiety symptoms, as well as improved sleep quality and cognitive functions. However, it's important to note that because this study wasn't placebo-controlled, further research is needed to confirm these promising effects.
Our findings indicated a significant reduction in depression and anxiety symptoms, as well as improved sleep quality and cognitive functions. However, it's important to note that because this study wasn't placebo-controlled, further research is needed to confirm these promising effects.
Read More
8
We investigated the effects of l-theanine added to sertraline in treating major depressive disorder (MDD). In a six-week, double-blind trial, participants took either l-theanine or a placebo alongside their medication. Results showed that those receiving l-theanine experienced a greater reduction in depression symptoms and higher remission rates compared to the placebo group. Though the study had a small sample size, the findings suggest l-theanine may be a promising adjunct therapy for improving treatment outcomes in MDD. More extensive research is needed for confirmation.
Read More
Most Useful Reviews
9
Gentle stabilisation
2 people found this helpful
L-Theanine has significantly helped my nervous system without dulling my senses like other stress medications. It gently restores balance, improving sleep, work performance, and helping me overcome depression—all without dependency issues. I wholeheartedly recommend it.
Read More
9
Improved energy levels
1 people found this helpful
This supplement is fantastic. I combine it with L-tyrosine, and the benefits are remarkable. It surpasses any prescription medication I've ever used for depression. The supplement is easy to swallow, tasteless, and of high quality. I find that I have more energy during the day, primarily because my mood has significantly improved.
Read More
7.5
Helpful combination
6 people found this helpful
This drug works well in conjunction with another treatment for coping with depression. I have taken it multiple times and find it effective.
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 4 Researches
7.8
- All Researches
8
We investigated the effects of l-theanine added to sertraline in treating major depressive disorder (MDD). In a six-week, double-blind trial, participants took either l-theanine or a placebo alongside their medication. Results showed that those receiving l-theanine experienced a greater reduction in depression symptoms and higher remission rates compared to the placebo group. Though the study had a small sample size, the findings suggest l-theanine may be a promising adjunct therapy for improving treatment outcomes in MDD. More extensive research is needed for confirmation.
Read More
8
L-theanine shows potential antidepressant effects
We examined how L-theanine, a compound found in green tea, influences depressive behaviors in a rat model. Using specific behavioral tests, such as the open-field and forced swim tests, we observed that L-theanine improved depressive-like behaviors.
Our findings indicated that it boosted levels of key neurotransmitters—serotonin, norepinephrine, and dopamine—in certain brain regions. This suggests that L-theanine could have potential antidepressant effects, possibly by interacting with these neurotransmitters in brain areas associated with mood regulation.
Our findings indicated that it boosted levels of key neurotransmitters—serotonin, norepinephrine, and dopamine—in certain brain regions. This suggests that L-theanine could have potential antidepressant effects, possibly by interacting with these neurotransmitters in brain areas associated with mood regulation.
Read More
8
We explored the effects of l-theanine, a natural amino acid found in green tea, on patients diagnosed with major depressive disorder (MDD) in an 8-week open-label study. We involved 20 participants who took 250 mg of l-theanine daily in addition to their regular medication.
Our findings indicated a significant reduction in depression and anxiety symptoms, as well as improved sleep quality and cognitive functions. However, it's important to note that because this study wasn't placebo-controlled, further research is needed to confirm these promising effects.
Our findings indicated a significant reduction in depression and anxiety symptoms, as well as improved sleep quality and cognitive functions. However, it's important to note that because this study wasn't placebo-controlled, further research is needed to confirm these promising effects.
Read More
7
This study focused on how L-theanine, administered over four weeks, affects stress-related symptoms and cognitive functions in healthy adults.
We found that participants who took 200 mg of L-theanine daily reported decreased depression, anxiety, and improved sleep quality compared to those on a placebo. Measures like verbal fluency and executive function showed significant improvements as well.
Our results suggest that L-theanine could be a helpful option for those facing stress and cognitive challenges, promoting better mental well-being.
We found that participants who took 200 mg of L-theanine daily reported decreased depression, anxiety, and improved sleep quality compared to those on a placebo. Measures like verbal fluency and executive function showed significant improvements as well.
Our results suggest that L-theanine could be a helpful option for those facing stress and cognitive challenges, promoting better mental well-being.
Read More
User Reviews
USERS' SCORE
Good
Based on 6 Reviews
8.4
- All Reviews
- Positive Reviews
- Negative Reviews
9
Gentle stabilisation
2 people found this helpful
L-Theanine has significantly helped my nervous system without dulling my senses like other stress medications. It gently restores balance, improving sleep, work performance, and helping me overcome depression—all without dependency issues. I wholeheartedly recommend it.
Read More
9
Improved energy levels
1 people found this helpful
This supplement is fantastic. I combine it with L-tyrosine, and the benefits are remarkable. It surpasses any prescription medication I've ever used for depression. The supplement is easy to swallow, tasteless, and of high quality. I find that I have more energy during the day, primarily because my mood has significantly improved.
Read More
7.5
Helpful combination
6 people found this helpful
This drug works well in conjunction with another treatment for coping with depression. I have taken it multiple times and find it effective.
Read More
9
Helps with depression
1 people found this helpful
I’ve used this product for a few years, and it genuinely helps with my depression.
Read More
8
Mood stability
1 people found this helpful
I love this product. I take one in the morning to help regulate my mood and stress throughout the day and another before bedtime to relax. 100mg is ideal for me; 200mg makes me feel lethargic. This truly assists anyone dealing with hyperactivity, stress, or depression.
Read More
Frequently Asked Questions
9
Improved energy levels
1 people found this helpful
This supplement is fantastic. I combine it with L-tyrosine, and the benefits are remarkable. It surpasses any prescription medication I've ever used for depression. The supplement is easy to swallow, tasteless, and of high quality. I find that I have more energy during the day, primarily because my mood has significantly improved.
9
Helps with depression
1 people found this helpful
I’ve used this product for a few years, and it genuinely helps with my depression.
7.5
Helpful combination
6 people found this helpful
This drug works well in conjunction with another treatment for coping with depression. I have taken it multiple times and find it effective.
9
Gentle stabilisation
2 people found this helpful
L-Theanine has significantly helped my nervous system without dulling my senses like other stress medications. It gently restores balance, improving sleep, work performance, and helping me overcome depression—all without dependency issues. I wholeheartedly recommend it.
8
Mood stability
1 people found this helpful
I love this product. I take one in the morning to help regulate my mood and stress throughout the day and another before bedtime to relax. 100mg is ideal for me; 200mg makes me feel lethargic. This truly assists anyone dealing with hyperactivity, stress, or depression.
7.5
Non-addictive supplement
L-theanine, a natural amino acid similar to glutamine, has a calming effect, boosts brain activity, improves cognitive functions, alleviates depression, and enhances mood. It's particularly effective when combined with caffeine. If you struggle to motivate yourself and wish to be less anxious, I switch between CoQ10 and L-theanine; both have similar effects and are not addictive.
8
We investigated the effects of l-theanine added to sertraline in treating major depressive disorder (MDD). In a six-week, double-blind trial, participants took either l-theanine or a placebo alongside their medication. Results showed that those receiving l-theanine experienced a greater reduction in depression symptoms and higher remission rates compared to the placebo group. Though the study had a small sample size, the findings suggest l-theanine may be a promising adjunct therapy for improving treatment outcomes in MDD. More extensive research is needed for confirmation.
7
This study focused on how L-theanine, administered over four weeks, affects stress-related symptoms and cognitive functions in healthy adults.
We found that participants who took 200 mg of L-theanine daily reported decreased depression, anxiety, and improved sleep quality compared to those on a placebo. Measures like verbal fluency and executive function showed significant improvements as well.
Our results suggest that L-theanine could be a helpful option for those facing stress and cognitive challenges, promoting better mental well-being.
We found that participants who took 200 mg of L-theanine daily reported decreased depression, anxiety, and improved sleep quality compared to those on a placebo. Measures like verbal fluency and executive function showed significant improvements as well.
Our results suggest that L-theanine could be a helpful option for those facing stress and cognitive challenges, promoting better mental well-being.
8
We explored the effects of l-theanine, a natural amino acid found in green tea, on patients diagnosed with major depressive disorder (MDD) in an 8-week open-label study. We involved 20 participants who took 250 mg of l-theanine daily in addition to their regular medication.
Our findings indicated a significant reduction in depression and anxiety symptoms, as well as improved sleep quality and cognitive functions. However, it's important to note that because this study wasn't placebo-controlled, further research is needed to confirm these promising effects.
Our findings indicated a significant reduction in depression and anxiety symptoms, as well as improved sleep quality and cognitive functions. However, it's important to note that because this study wasn't placebo-controlled, further research is needed to confirm these promising effects.
References
- Shamabadi A, Kafi F, Arab Bafrani M, Asadigandomani H, A Basti F, et al. l-theanine adjunct to sertraline for major depressive disorder: A randomized, double-blind, placebo-controlled clinical trial. J Affect Disord. 2023;333:38. doi:10.1016/j.jad.2023.04.029
- Hidese S, Ogawa S, Ota M, Ishida I, Yasukawa Z, et al. Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients. 2019;11. doi:10.3390/nu11102362
- Shen M, Yang Y, Wu Y, Zhang B, Wu H, et al. L-theanine ameliorate depressive-like behavior in a chronic unpredictable mild stress rat model via modulating the monoamine levels in limbic-cortical-striatal-pallidal-thalamic-circuit related brain regions. Phytother Res. 2019;33:412. doi:10.1002/ptr.6237
- Hidese S, Ota M, Wakabayashi C, Noda T, Ozawa H, et al. Effects of chronic l-theanine administration in patients with major depressive disorder: an open-label study. Acta Neuropsychiatr. 2017;29:72. doi:10.1017/neu.2016.33
