PlainVitamins

L-Theanine 100 mg

by NOW · capsule · 90 veg capsules

  • On the market (NIH)
  • UPC 7 33739 00145 0
  • DSLD label 244405
  • Serving 1 veg capsule

L-Theanine 100 mg by NOW lists 2 ingredients, 2 with an amount per serving of 1 veg capsule, such as 100 mg of L-theanine and 250 mg of decaffeinated green tea. Its current label entered the NIH Dietary Supplement Label Database on February 25, 2021.

What is in L-Theanine 100 mg?

Each row as the label prints it, per serving of 1 veg 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).

L-Theanine 100 mg: Supplement Facts rows against the market (DSLD label 244405, January 2026 release)
IngredientAmount% DVAmong products listing it
L-Theanine100 mgTheanine in L-Theanine 100 mg against 1,602 products100 mg per serving; the middle half of products list 90 mg to 200 mg, the median 100 mg.100 mg

47% of 1,602 products listing theanine give more (median 100 mg).

decaffeinated Green Tea250 mgGreen Tea in L-Theanine 100 mg against 2,595 products250 mg per serving; the middle half of products list 50 mg to 250 mg, the median 100 mg.250 mg

Higher than 73% of 2,595 products listing green tea (median 100 mg).

Source: NIH ODS Dietary Supplement Label Database, label 244405 (entered February 25, 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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

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?

4 products list the very same ingredients; the nearest amounts come first.

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 Usage: Take 1 capsule 1 to 2 times daily as needed, with food.
Caution: Take with food.
Warnings
Do not take this product on an empty stomach; do not exceed recommended dose.
Caution: Take with food. For adults only.
Consult physician if pregnant/nursing, taking medication, or have a medical condition (including liver disease).
Keep out of reach of children.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Allergens and what it does not contain
Non-GMO
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.
Storage
Store in a cool, dry place after opening.

Source: label statements in DSLD label 244405.

What else is on the label?

Other ingredients: Hypromellose, Rice Flour, Stearic Acid, Silicon Dioxide.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Triangle K (Kosher); GMP Quality Assured.

How many labels does L-Theanine 100 mg have?

3 labels are on file under this name since December 29, 2014: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 244405 (current) Entered February 25, 2021 · on the market · 90 veg capsules · UPC 7 33739 00145 0
  2. Label 55128 Entered December 23, 2015 · off the market August 8, 2023 · 90 veg capsules · UPC 7 33739 00145 0
  3. Label 40212 Entered December 29, 2014 · off the market November 24, 2015 · 90 veg capsules · UPC 7 33739 00145 0

DSLD also links this label to: L-Theanine 100 mg Suntheanine (image difference, same product), L-Theanine 100 mg Suntheanine (image difference, same product).

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names NOW Foods (manufacturer), Bloomingdale, IL. All NOW products.

Where next?