L-Theanine 400 mg
by Mental Refreshment · capsule · 180 capsules
- On the market (NIH)
- UPC 7 15854 66471 0
- DSLD label 247845
- Serving 2 capsules
- 90 servings
L-Theanine 400 mg by Mental Refreshment lists one ingredient: 400 mg of L-theanine per serving of 2 capsules. Its current label entered the NIH Dietary Supplement Label Database on April 22, 2021.
What is in L-Theanine 400 mg?
Each row as the label prints it, per serving of 2 capsules. 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 | 400 mg | Higher than 97% of 1,602 products listing theanine (median 100 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 247845 (entered April 22, 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 400 mg of L-theanine (filed by NIH under theanine) is higher than 97% of the 1,602 theanine products that print an amount; 18 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-TheanineOL Olympian Labs · off the market same ingredients
- L-Theanine 400 mgOL Olympian Labs same ingredients
- L-TheaninePure Encapsulations same ingredients
- L-TheanineXYMOGEN same ingredients
- L-Theanine 200 mgWoodstock Vitamins same ingredients
- Suntheanine 400 mgSuperSmart 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: For adults, take two (2) capsules daily before a meal. As a reminder, discuss the supplements and medications you take with your health care providers.
- Warnings
- Keep out of reach of children.
- Warning: If you are pregnant, nursing or taking any medications, consult your doctor before use.
- Discontinue use and consult your doctor if any adverse reactions occur.
- Allergens and what it does not contain
- Contains No: Artificial coloring, artificial flavor, preservatives, yeast, corn, milk or milk derivatives, lactose, salt, sodium, soy, sugar, gluten, starch or wheat.
- Storage
- Store in a dry place and avoid excessive heat.
Source: label statements in DSLD label 247845.
What else is on the label?
Other ingredients: Gelatin, Rice powder.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Manufactured in a FDA Registered facility that conforms to GMP standards GMP Good Manufacturing Practice Consistent Quality Made in the USA.
How many labels does L-Theanine 400 mg have?
One label is on file, entered on April 22, 2021.
- Label 247845 (current) Entered April 22, 2021 · on the market · 180 capsules · UPC 7 15854 66471 0
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Mental Refreshment Nutrition (manufacturer). All Mental Refreshment products.