Last update
3/8/2026
Reviewed By
Overview
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 165 Reviews
8
Supplement Facts
Serving Size: 1 Veg Capsule
Amount Per Serving
%DV
L-Theanine
200 mg
*
Inositol
100 mg
*
Most Useful Reviews
9
Focus enhancement
105 people found this helpful
The WOW effect is felt 10-20 minutes after ingestion. I drink it with caffeine before tackling difficult tasks. Caffeine lifts my spirits while theanine sharpens my concentration. The feeling is extraordinary, as though I am in a high state of focus and nothing can distract me. It's a miracle!
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10
Stress relief
69 people found this helpful
I regret not discovering iHERB with Theanine earlier; I could have saved much health by avoiding stress. Now, Theanine is a staple in my supplements for stability. In stressful situations, I take it with tea in the morning. The irritant feelings subside, and I manage stress better, keeping a clear mind and cognitive functions sharp. Its neuroprotective properties are beneficial for preventing age-related diseases.
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9
Positive ADHD alternative
28 people found this helpful
Theanine has been fantastic for both my daughter and me; it alleviates anxiety without side effects, unlike typical antidepressants. I love it, and the calm it brings is incredible! I've tried other brands, but I prefer this one for its effectiveness. My family members also appreciate its benefits.
Read More
User Reviews
USERS' SCORE
Good
Based on 165 Reviews
8
- All Reviews
- Positive Reviews
- Negative Reviews
9
Focus enhancement
105 people found this helpful
The WOW effect is felt 10-20 minutes after ingestion. I drink it with caffeine before tackling difficult tasks. Caffeine lifts my spirits while theanine sharpens my concentration. The feeling is extraordinary, as though I am in a high state of focus and nothing can distract me. It's a miracle!
Read More
10
Stress relief
69 people found this helpful
I regret not discovering iHERB with Theanine earlier; I could have saved much health by avoiding stress. Now, Theanine is a staple in my supplements for stability. In stressful situations, I take it with tea in the morning. The irritant feelings subside, and I manage stress better, keeping a clear mind and cognitive functions sharp. Its neuroprotective properties are beneficial for preventing age-related diseases.
Read More
9
Positive ADHD alternative
28 people found this helpful
Theanine has been fantastic for both my daughter and me; it alleviates anxiety without side effects, unlike typical antidepressants. I love it, and the calm it brings is incredible! I've tried other brands, but I prefer this one for its effectiveness. My family members also appreciate its benefits.
Read More
9
Helps with insomnia
16 people found this helpful
Fantastic product! I've struggled with insomnia since childhood due to ADHD, but since taking this with my sleep medication and melatonin, I’ve been able to fall asleep naturally. I’m no longer groggy in the morning and feel much calmer throughout the day, which reduces my reliance on strong prescription drugs. It’s been a genuine lifesaver for my sleep routine.
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9
Reduced tantrums
12 people found this helpful
I take L-theanine for my son who shows characteristics of ASD and attention deficit hyperactivity disorder. Mixing the contents of the capsule with yogurt helps him remain calm and reduces tantrums. While I can't attribute the improvement solely to it, I plan to continue using it as there are no side effects, and I hope it helps with concentration as well.
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Frequently Asked Questions
No FAQs are available for this product and symptom.
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