$16.99 per container, before delivery
$0.283 per 5g L-glutamine, before delivery
Delivery extra; amount unknown
Price checked Nov 13, 2026.
Buy at MuscleTech (direct) →Label, prices & sources →Sports Research L-Glutamine, Unflavored (500 g)
B · Informed Sport
Label read Oct 30, 2026. Where the data comes from
Is Sports Research L-glutamine third party tested? · Is Sports Research third party tested? · Which L-glutamine brands are third-party tested?
Comparing with a package we do not list? Cost per dose calculator
Cost
$0.28
per 5g L-glutamine
$27.95
per container · Sports Research (direct)
last known price, Nov 4, 2026
$8.39
a month at one dose a day, before delivery
Amount per serving
5g L-glutamine
Servings per container
100
Units needed per dose
1.00 scoop
Doses per container
100.0
Cost per serving
$0.28
- Printed on this 500 g tub's own panel as "L-Glutamine (fermented) 5 g" in a "Serving Size: 1 Scoop (5 g)" serving, with "Servings Per Container: 100". We compare grams of L-glutamine, and the panel prints grams, so nothing is converted. The panel names one ingredient and no other active. The label's "Gluten-Free" checklist line is what the gluten free answer rests on; it makes no vegan or vegetarian claim, so those are Unknown.
Delivery
Delivery cost
$7.50
Below free delivery (orders of $50.00 or more); $22.05 more would make delivery free.
Cost per dose delivered
$0.355
To get free delivery
Spend $22.05 more at Sports Research (direct)
Delivery policy: Sports Research, Sports Research Shipping page, re-read October 17, 2026 · checked Oct 17, 2026
Buying more than one? Calculate the order
Change the quantity to see the actual container subtotal and whether it reaches the recorded free-delivery threshold.
- Container subtotal
- $27.95
- Delivery
- $7.50
- Order total, before tax
- $35.45
- Per 5g L-glutamine, delivery included
- $0.355
100 labeled servings in this order. Comparison doses are a price yardstick, not advice about how much to take.
Uses a last known price from Nov 4, 2026. Check the current price before relying on this total.
Check current price at Sports Research (direct) →Set the quantity at the retailer. This calculator does not add items to a cart. Uses the recorded unit price with no coupon or quantity discount. Tax is extra. Delivery terms apply to the contiguous US unless the policy says otherwise.
Delivery terms and limits
Free shipping on orders with subtotals of $50 or more, before tax and after discounts; below that a published $7.50 flat rate (yoga mat and therapy gun excluded), so the delivered cost is known at every price. Standard delivery: 2 business days processing plus up to 10 business days in transit.
Where to buy
Sports Research (direct) · lowest recorded available price
we earn nothing on this link
stale, checked Nov 4, 2026$27.95Check current price
Ordered by price, lowest first, and labeled so you can see what each link earns us. Commission is never an input to that ordering. If the retailer with the lowest price pays us nothing, that is still the one we send you to. No link on this page earns us anything. Every Buy button is a plain retailer link.
Price history
Latest recorded price: $27.95 at Sports Research (direct), checked . Unchanged since we started checking on Oct 30 (3 checks).
This store’s prices are read by hand, less often than daily, so this is the range we recorded, not necessarily every price there has been. It says what changed, not why, and nothing about where the price goes next.
Verification level B: Independently tested
A third party with no commercial stake in the product has tested it and published the result: Informed Sport, Informed Choice, IFOS, BSCG, or an independent laboratory. What that testing covers varies by program and is not always what you would assume: Informed Sport and Informed Choice screen finished batches for substances banned in sport and review manufacturing procedures on paper, which is not the same as confirming the label’s dose or testing for heavy metals. The listings below say which program this is, so you can check what it actually covers.
- Current listing found: Informed Sport.
- Checked NSF Certified for Sport database on Oct 30, 2026: not listed.
- Checked USP Verified database on Sep 21, 2026: not listed.
NSF Certified for Sport: checked, not listed
Checked and absent. NSF's whole Certified for Sport directory, read on Oct 30, 2026, carries 14 listings naming glutamine, and none is filed under this brand. Absence from a database is not a failed test.
Source: NSF Certified for Sport, NSF Certified for Sport directory, full read, October 30, 2026 (the 14 listings naming glutamine) · checked Oct 30, 2026USP Verified: checked, not listed
Checked and absent. We read all 16 pages of USP's own Verified Products directory in a browser on Sep 21, 2026: 159 products from 16 brands. We saved a copy. This brand is not in it: not in the directory's brand filter, and not in any product name. USP verifies the products a company submits to it, so this shows only which products were submitted. Not being listed is not a failed test.
Source: USP, USP Verified Products directory, full read, September 21, 2026 · checked Sep 21, 2026Informed Sport: currently listed
LGC's own Informed Sport product list of October 2026, as read on Oct 3, 2026, prints "L-Glutamine" under Sports Research, and this tub's own label, read on Oct 30, 2026, prints the Informed Sport mark. That names this product. The list prints no package size, flavor, batch or date, and Informed Sport certifies batch by batch, so the question we ask of NSF listings, whether they name this package size, does not apply here. A listing from a batch program says the product is in the program. It does not say that any one package or batch was tested.
What Informed Sport checks
| Confirms the label’s dose | Not stated |
| Tests for heavy metals / contaminants | Not stated |
| Screens for substances banned in sport | Yes |
| Reviews manufacturing | Paper-based review |
| Testing frequency | Every batch |
From the program's own published description of its process. Source. “Not stated” means the program does not publish a clear answer. It does not mean no.
Informed Choice: checked, not listed
Sports Research is on LGC's Informed Choice product list of October 2026, which we read on Oct 3, 2026. None of its 10 product lines names an L-glutamine product. Not being listed is not a failed test. Informed Choice certifies what a company submits, so this means only that this product was not on the published list that day.
Source: LGC (Informed Choice), Informed Choice product list, October 2026 PDF, as read October 3, 2026 · checked Oct 3, 2026No laboratory report with figures is recorded here for this product.
Not established: Heavy-metal testing, Label-accuracy testing, Vegan status.
Absence of data is not evidence that a product is clean. It means we found no published result for that testing.
Label
Form
powder
Serving size
1 scoop
Active ingredient
L-glutamine: 5g as labeled
Printed on this 500 g tub's own panel as "L-Glutamine (fermented) 5 g" in a "Serving Size: 1 Scoop (5 g)" serving, with "Servings Per Container: 100". We compare grams of L-glutamine, and the panel prints grams, so nothing is converted. The panel names one ingredient and no other active. The label's "Gluten-Free" checklist line is what the gluten free answer rests on; it makes no vegan or vegetarian claim, so those are Unknown.
Vegan
Unknown
Gluten free
Yes
Allergens
Unknown
Other ingredients
Unknown
Label facts rest on: Sports Research, Supplement Facts panel and label faces: Sports Research L-Glutamine, Unflavored, 500 g · checked Oct 30, 2026
Other tracked packages
Packages in the same category and format, with the same ingredients. Where we recorded the ingredient forms from the label, only packages with the same forms are shown. Where a category is compared by strength, they also have the same labeled strength. Only current prices are shown, cheapest container first. Prices are before delivery. Formulas, flavors and allergens may differ: check each label. These are browsing options, not recommended substitutes.
$17.97 per container, before delivery
$0.359 per 5g L-glutamine, before delivery
Delivery extra; amount unknown
Price checked Nov 13, 2026.
Buy at Nutricost (direct) →Label, prices & sources →$20.97 per container, before delivery
$1.05 per 5g L-glutamine, before delivery
Delivery extra; amount unknown
Price checked Nov 13, 2026.
Buy at BulkSupplements.com →Label, prices & sources →What this rests on: Prices are the last ones we recorded at the retailer named on each product page. Prices go stale, so each page says when it was checked. We track some products, not every one sold, and Amazon and Walmart are not among our stores. Listings and labels are read at the source, and each page links to them. Found an error? Tell us. The full method: How we compare.