Food supplement · SuperiorLabs
L-Theanine
Why SuperiorLabs l-theanine?
- 250 mg l-theanine per serving
- L-Theanine capsules manufactured by Superior Labs contain 250mg pure L-Theanine with absolutely no magnesium stearate, dioxides, preservatives or other potentially harmful artificial ingredients of any kind.
- Does Not Contain: Magnesium stearate, dioxides, preservatives, or artificial ingredients of any kind.
From the label’s panel and printed marks — not its marketing.
Sold as food, not medicine — no regulator checked that it works
Per serving · 1 Capsule(s)
At a glance
From the label as printed · NIH DSLD
Herbal supplement · Capsule
Per serving250 mg l-theanine
90 servings per container
As a dietary supplement, adults take 1 capsule one to two times daily, or as directed by your health care practitioner.
One serving: 1 Capsule(s)
No third-party testing mark on the label
Marks like USP Verified mean an independent lab checked that the product contains what the label says.
- Food supplement — claims are the manufacturer’s
- L-Theanine capsules manufactured by Superior Labs contain 250mg pure L-Theanine with absolutely no magnesium stearate, dioxides, preservatives or other potentially harmful artificial ingredients of any kind.
- Does Not Contain: Magnesium stearate, dioxides, preservatives, or artificial ingredients of any kind.
- Adult (18 - 50 Years)
Supplement Facts
Supplement Facts
Serving size 1 Capsule(s)
Servings per container 90
| Amount per serving | % DV | |
|---|---|---|
| L-Theanine | 250 mg | † |
† Daily Value not established.
Other ingredients: natural Rice concentrate, Plant Cellulose
Transcribed from the label by the NIH Office of Dietary Supplements. What a label says is not independently verified. See the original label
How to take it
- Suggested Use: As a dietary supplement, adults take 1 capsule one to two times daily, or as directed by your health care practitioner. Best when taken with a meal.
The manufacturer’s directions, from the label.
Warnings on the label
- Caution: Do not exceed recommended dosage.
- Please consult physician before consuming this product if pregnant or nursing, taking medication or have a medical condition.
- Not intended for use by individuals under the age of 18.
- Do not use if safety seal is damaged or missing.
- Keep out of reach of children.
What no one has checked
Supplements are regulated as food, not as medicine. No regulator has assessed whether this product works, and manufacturing standards vary widely between brands and countries.
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Details
| Brand | SuperiorLabs |
|---|---|
| UPC | 8 50569 00619 3 |
| NIH label ID | 227910 |
| Label recorded | 2020-06-24 |
Source: Dietary Supplement Label Database · NIH Office of Dietary Supplements · retrieved 2026-09-21 · not reviewed by a nutrition professional