Last update
6/4/2026
Reviewed By
Overview
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Medium or Average
Based on 6 Reviews
6.4
Supplement Facts
Serving Size: 1 Veggie Capsule
Serving Per Container: 90
Amount Per Serving
%DV
L-Theanine (Suntheanine®)
150 mg
†
Most Useful Reviews
0
No improvement noted
6 people found this helpful
No effect! I have been drinking with my daughter for a month, who has autism. I became even more irritable; it didn't help me at all. I noticed an effect from magnesium and from 5 ntr.
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9
Calming effect confirmed
1 people found this helpful
I can't go without this supplement. It’s really effective. When I feel irritable and tired, it calms me down quickly. I highly recommend it!
Read More
2
No effect experienced
7 people found this helpful
I bought Santianin - L-Tianin for my 64-year-old mother, who is very irritable and pessimistic. She was hoping for a miracle, but alas, there was no effect, and I wouldn’t advise it.
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User Reviews
USERS' SCORE
Medium or Average
Based on 6 Reviews
6.4
- All Reviews
- Positive Reviews
- Negative Reviews
0
No improvement noted
6 people found this helpful
No effect! I have been drinking with my daughter for a month, who has autism. I became even more irritable; it didn't help me at all. I noticed an effect from magnesium and from 5 ntr.
Read More
9
Calming effect confirmed
1 people found this helpful
I can't go without this supplement. It’s really effective. When I feel irritable and tired, it calms me down quickly. I highly recommend it!
Read More
2
No effect experienced
7 people found this helpful
I bought Santianin - L-Tianin for my 64-year-old mother, who is very irritable and pessimistic. She was hoping for a miracle, but alas, there was no effect, and I wouldn’t advise it.
Read More
2
Strange experience reported
1 people found this helpful
I tried this product alongside Now's l-theanine to compare. It gave my sister and me a strange experience—we felt wired but somewhat loopy and irritable. It was hard to concentrate, and I worried about being impulsive while working and needing to communicate effectively. The strength of this experience was noticeable.
Read More
7.5
Effective relief observed
Suntheanine is good. I have tried other theanine products, but Suntheanine works well for me. The others gave me a headache initially, but this one doesn’t. When feeling irritable and anxious, I take one tablet and feel better. I’m also taking Washwaganda, Rhodiola, and Vitamin B-12; I use Theanine only when needed.
Read More
Frequently Asked Questions
0
No improvement noted
6 people found this helpful
No effect! I have been drinking with my daughter for a month, who has autism. I became even more irritable; it didn't help me at all. I noticed an effect from magnesium and from 5 ntr.
9
Calming effect confirmed
1 people found this helpful
I can't go without this supplement. It’s really effective. When I feel irritable and tired, it calms me down quickly. I highly recommend it!
2
Strange experience reported
1 people found this helpful
I tried this product alongside Now's l-theanine to compare. It gave my sister and me a strange experience—we felt wired but somewhat loopy and irritable. It was hard to concentrate, and I worried about being impulsive while working and needing to communicate effectively. The strength of this experience was noticeable.
7.5
Effective relief observed
Suntheanine is good. I have tried other theanine products, but Suntheanine works well for me. The others gave me a headache initially, but this one doesn’t. When feeling irritable and anxious, I take one tablet and feel better. I’m also taking Washwaganda, Rhodiola, and Vitamin B-12; I use Theanine only when needed.
