L-Threonine 500 mg
by Douglas Laboratories · capsule · 60 capsules
- On the market (NIH)
- UPC 3 10539 00577 4
- DSLD label 232306
- Serving 1 capsule
- 60 servings
L-Threonine 500 mg by Douglas Laboratories lists one ingredient: 500 mg of L-threonine per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2020.
What is in L-Threonine 500 mg?
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-Threonine | 500 mg | 46% of 590 products listing THREONINE give more (median 500 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 232306 (entered August 23, 2020), 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?
6 products list the very same ingredients; the nearest amounts come first.
- Pure L-Threonine 500 MilligramsMontiff same ingredients
- L-Threonine 500 mgSolgar same ingredients
- L-Threonine 500 mgVitamatic same ingredients
- L-ThreonineBulkSupplements.com same ingredients
- L-Threonine 500 mg CapsulesBulkSupplements.com same ingredients
- 100% Pure L-ThreonineNutraBio 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 Usage: As a dietary supplement, adults take 1 capsule daily or as directed by your health professional.
- Warnings
- Warning: If you are pregnant, nursing, have any health condition or taking any medication, consult your health professional before using this product.
- Keep out of the reach of children.
- Use only if safety seal is intact.
- Allergens and what it does not contain
- Gluten-free, Non-GMO
- Storage
- Store in a cool, dry place.
Source: label statements in DSLD label 232306.
What else is on the label?
Other ingredients: Gelatin, Microcrystalline Cellulose, Vegetable Stearate.
How many labels does L-Threonine 500 mg have?
3 labels are on file under this name since February 23, 2012: other sizes, label designs and reformulations. The current one leads this page.
- Label 232306 (current) Entered August 23, 2020 · on the market · 60 capsules · UPC 3 10539 00577 4
- Label 9278 Entered June 25, 2012 · off the market June 26, 2020 · 60 capsules · UPC 3 10539 00577 4
- Label 5344 Entered February 23, 2012 · off the market January 20, 2012 · 60 capsules · UPC 3 10539 00577 4
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Douglas Laboratories (manufacturer), Pittsburgh, PA. All Douglas Laboratories products.