PlainVitamins

Suntheanine L-Theanine 125 mg

by Natural Factors Stress-Relax · capsule · 60 vegetarian capsules

  • On the market (NIH)
  • UPC 0 68958 04830 7
  • DSLD label 76495
  • Serving 1 to 2 vegetarian capsules; amounts per 1 vegetarian capsule
  • 30 servings

Suntheanine L-Theanine 125 mg by Natural Factors Stress-Relax lists one ingredient: 250 mg of suntheanine L-theanine per serving of 1 vegetarian capsule. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2017.

What is in Suntheanine L-Theanine 125 mg?

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

Suntheanine L-Theanine 125 mg: Supplement Facts rows against the market (DSLD label 76495, January 2026 release)
IngredientAmount% DVAmong products listing it
Suntheanine L-Theanine250 mgTheanine in Suntheanine L-Theanine 125 mg against 1,602 products250 mg per serving; the middle half of products list 90 mg to 200 mg, the median 100 mg.250 mg

Higher than 90% of 1,602 products listing theanine (median 100 mg). Per day at the most servings: 500 mg.

Source: NIH ODS Dietary Supplement Label Database, label 76495 (entered July 25, 2017), 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 1 to 2 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.

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: 1-2 capsules 1-2 times per day or as directed by a health professional.
Warnings
Cautions: As with any supplement, consult your health professional before use if you are pregnant, breastfeeding, or trying to conceive, or if you are taking medication, have a medical condition, or anticipate a surgery.
Keep out of the reach of children.
Sealed for your protection. Do not use if seal is broken.
Allergens and what it does not contain
Contains no artificial colors, preservatives, or sweeteners; no dairy, sugar, wheat, gluten, yeast, soy, corn, egg, fish, shellfish, animal products, salt, tree nuts, or GMOs.
Storage
For freshness, store in a cool, dry place.

Source: label statements in DSLD label 76495.

What else is on the label?

Other ingredients: Rice powder, Vegetarian Capsule, Magnesium Stearate, Silica.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): isura Non-GMO - Mass Spec Documentation - Lab tested; Purity & potency guaranteed.

How many labels does Suntheanine L-Theanine 125 mg have?

3 labels are on file under this name since June 1, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 76495 (current) Entered July 25, 2017 · on the market · 60 vegetarian capsules · UPC 0 68958 04830 7
  2. Label 51765 Entered October 22, 2015 · off the market May 6, 2017 · 60 vegetarian capsules · UPC 0 68958 04830 7
  3. Label 9699 Entered June 1, 2012 · off the market September 16, 2015 · 60 vegetarian capsules · UPC 0 68958 04830 7

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

Who makes it?

The label names Natural Factors Canada (manufacturer). All Natural Factors Stress-Relax products.

Where next?