L-Theanine
by Pure · capsule · 365 capsules
- On the market (NIH)
- DSLD label 248696
- Serving 1 capsule
- 365 servings
L-Theanine by Pure lists one ingredient: 355 mg of L-theanine per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on June 23, 2021.
What is in L-Theanine?
Each row as the label prints it, per serving of 1 capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| L-Theanine | 355 mg | Higher than 96% of 1,602 products listing theanine (median 100 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 248696 (entered June 23, 2021), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:
- Its 355 mg of L-theanine (filed by NIH under theanine) is higher than 96% of the 1,602 theanine products that print an amount; 61 list more.
The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.
The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.
Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.
Which products have the closest formulas?
6 products list the very same ingredients; the nearest amounts come first.
- L-TheanineEarthborn Elements same ingredients
- L-TheanineOL Olympian Labs · off the market same ingredients
- L-Theanine 400 mgOL Olympian Labs same ingredients
- L-Theanine 400 mgMental Refreshment same ingredients
- L-TheaninePure Encapsulations same ingredients
- L-TheanineXYMOGEN same ingredients
Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.
What does the label say about taking it?
Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.
- Directions
- Suggested use: Take 1 capsule daily or as directed by a physician. Take with at least 8 oz of liquid.
- Warnings
- If you are pregnant, nursing, or taking medication, consult your physician before taking this or any dietary supplement.
- For adults only.
- Allergens and what it does not contain
- Gluten-free
Source: label statements in DSLD label 248696.
What else is on the label?
Other ingredients: Gelatin Capsules.
How many labels does L-Theanine have?
One label is on file, entered on June 23, 2021.
- Label 248696 (current) Entered June 23, 2021 · on the market · 365 capsules
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Pure Supplements (manufacturer), Lindon, UT. All Pure products.