L-Glutamine 500 mg
by Puritan's Pride · tablet or pill · 100 coated tablets
- On the market (NIH)
- UPC 0 74312 13042 7
- DSLD label 286173
- Serving 4 tablets
- 25 servings
L-Glutamine 500 mg by Puritan's Pride lists one ingredient: 2,000 mg of L-glutamine per serving of 4 tablets. Its current label entered the NIH Dietary Supplement Label Database on June 22, 2023.
What is in L-Glutamine 500 mg?
Each row as the label prints it, per serving of 4 tablets. 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-Glutaminefree form | 2,000 mg | Higher than 56% of 1,850 products listing glutamine (median 1 g). Per day at the most servings: 4 g. |
Source: NIH ODS Dietary Supplement Label Database, label 286173 (entered June 22, 2023), 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?
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 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.
- L-Glutamine 1000MET-Rx same ingredients
- L-Glutamine 1000 mgSolgar same ingredients
- L-GlutamineJarrow Formulas · off the market same ingredients
- L-Glutamine 1000 mgBest Naturals same ingredients
- L-Glutamine PowderJarrow Formulas · off the market same ingredients
- L-GlutamineSource Naturals 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 four (4) tablets two times daily, preferably on an empty stomach.
- Warnings
- Warning: If pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use.
- Discontinue use and consult your doctor if any adverse reactions occur.
- Keep out of reach of children.
- Do not use if seal under cap is broken or missing.
- Allergens and what it does not contain
- No artificial color, flavor or sweetener, no preservatives, no sugar, no starch, no milk, no lactose, no soy, no gluten, no wheat, no yeast, no fish. Sodium free.
- Storage
- Store at room temperature.
Source: label statements in DSLD label 286173.
What else is on the label?
Other ingredients: Cellulose, Dicalcium Phosphate, Silica, Magnesium Stearate.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): QA Quality Assured.
How many labels does L-Glutamine 500 mg have?
One label is on file, entered on June 22, 2023.
- Label 286173 (current) Entered June 22, 2023 · on the market · 100 coated tablets · UPC 0 74312 13042 7
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Puritan's Pride, Inc. (manufacturer), Ronkonkoma, NY, U.S.A.. All Puritan's Pride products.