L-Theanine 300
by Everyday Health · capsule · 90 capsules
- On the market (NIH)
- UPC 9 421902 427312
- DSLD label 306092
- Serving 1 capsule
- 90 servings
L-Theanine 300 by Everyday Health lists one ingredient: 300 mg of L-theanine per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on January 24, 2024.
What is in L-Theanine 300?
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 | 300 mg | Higher than 92% of 1,602 products listing theanine (median 100 mg). Per day at the most servings: 900 mg. |
Source: NIH ODS Dietary Supplement Label Database, label 306092 (entered January 24, 2024), version 9.4.0. See the label on DSLD or its label image (PDF). 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 300 mg of L-theanine (filed by NIH under theanine) is higher than 92% of the 1,602 theanine products that print an amount; 73 list more.
The NIH database records 1 to 3 servings 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-TheanineNOW same ingredients
- L-TheaninePure same ingredients
- L-TheanineEarthborn Elements same ingredients
- L-TheaninePureBulk.com same ingredients
- Suntheanine L-Theanine 125 mgNatural Factors Stress-Relax same ingredients
- Pure L-TheanineMicro Ingredients 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
- Directions: Take 1 capsule as required, up to 3 times per day 5 hours apart, or as directed by your health care practitioner.
- Warnings
- Caution: If you suffer from any health problems or on medications consult a physician before using.
- Keep out of reach of children.
Source: label statements in DSLD label 306092.
What else is on the label?
Other ingredients: Magnesium Stearate, Gelatin.
How many labels does L-Theanine 300 have?
One label is on file, entered on January 24, 2024.
- Label 306092 (current) Entered January 24, 2024 · on the market · 90 capsules · UPC 9 421902 427312
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Everyday Health Ltd (manufacturer), Rangiora, New Zealand. All Everyday Health products.