DeliveredDose

Optimum Nutrition Glutamine Powder, Unflavored (300 g)

D · Not settled
$28.49 at Optimum Nutrition (direct) · $0.491 per 5g
Delivery adds $5.99
Buy at Optimum Nutrition (direct)

Label read Oct 31, 2026. Where the data comes from

Is Optimum Nutrition third party tested? · Which L-glutamine brands are third-party tested?

Cost

$0.491
per 5g L-glutamine
$28.49
per container · Optimum Nutrition (direct)
$14.74
a month at one dose a day
Amount per serving
5g L-glutamine
Servings per container
58
Units needed per dose
1.00 heaping teaspoon
Doses per container
58.0
Cost per serving
$0.491
  • Printed on this size's own panel image (ONUS-glutamine-powder_Label_0-66lb_58-servings.jpg) as "L-Glutamine 5 g*" in a "Serving Size 5.15 g (About 1 Heaping Teaspoon)" serving, with "Serving Per Container 58". The comparison basis is grams of L-glutamine and the panel prints grams, so nothing is converted; the panel names L-glutamine and no other dietary ingredient. "OTHER INGREDIENTS: None." is printed below the panel. The front image the store's feed lists for this size prints "NET WT 10.58 OZ (300 G)" and "58 SERVINGS", which is what the net weight rests on. No gluten, vegan, vegetarian or allergen statement is printed, so each is Unknown.

Delivery

Delivery cost
$5.99
Below the $75.00 free-delivery threshold; $46.51 more would make delivery free.
Cost per dose delivered
$0.594
To get free delivery
Spend $46.51 more at Optimum Nutrition (direct)
Delivery policy: Optimum Nutrition (direct), Optimum Nutrition (direct) delivery terms, 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
$28.49
Delivery
$5.99
Order total, before tax
$34.48
Per 5g L-glutamine, delivery included
$0.594

58 labeled servings in this order. Comparison doses are a price yardstick, not advice about how much to take.

Unit price checked Oct 30, 2026.
View this package at Optimum Nutrition (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 policy: Optimum Nutrition (direct), Optimum Nutrition (direct) delivery terms, re-read October 17, 2026 · checked Oct 17, 2026
Delivery terms and limits

Standard delivery in the US is free on orders over $75 and costs $5.99 below that, from the delivery chart on Optimum Nutrition's Delivery Information page, read October 2, 2026. The storefront's announcement bar has read "Free shipping on orders above $75" since at least September 7, 2026. Subscription orders also ship free at any size, but that is a different purchase from the one-time price shown here. Read again on October 17, 2026, with the same chart row.

Where to buy

Optimum Nutrition (direct) · lowest recorded available price
we earn nothing on this link
checked today
$28.49Buy

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 cheapest retailer 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: $28.49 at Optimum Nutrition (direct), checked . First checked on Oct 30.

We check each price about once a day, 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, Tier D: Entry found, not settled

A certifier’s directory holds an entry that may cover this product. Whether it names this package is not settled either way, so it is neither a listing nor an absence, and it is not a finding against the product. Which certifier databases we searched, and when, is listed below. Where a program is not listed there, we have not checked it and do not imply anything either way.

  • Searched 4 certifier databases and found no listing settled as naming this product, and located no published test results. A certifier's directory holds an entry (ON Glutamine Powder) that may cover this package; whether it does is not settled either way. A program not named below was not checked for this product.
  • 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 was read on Oct 30, 2026, 2,593 listings, and holds two Optimum Nutrition rows, 1256427 "GOLD STANDARD 100% WHEY DOUBLE RICH CHOCOLATE" and 1484223 "Gold Standard 100% Whey Vanilla Ice Cream", both the Gold Standard 100% Whey line; none of the 14 listings whose product name contains "glutamine" is this brand's. The panel image read for this package prints no NSF mark. Absence from a database is not a failed test.
Source: NSF Certified for Sport, NSF Certified for Sport directory, full read, October 30, 2026 (Optimum Nutrition and MuscleTech, L-glutamine) · checked Oct 30, 2026
USP Verified: checked, not listed
Checked and absent. USP's own Verified Products directory was read page by page in a browser on Sep 21, 2026: 16 pages, 159 products, 16 brands, captured in this site's directory snapshot. This brand does not appear in the directory or in its brand facet, and no product in it names this brand. USP verifies the products a company submits to it, so this records which products were submitted and nothing else. Absence from a database is not a failed test.
Source: USP, USP Verified Products directory, full read, September 21, 2026 · checked Sep 21, 2026
Informed Sport: checked, not listed
Optimum Nutrition is on LGC's own Informed Sport product list of October 2026, read on Oct 3, 2026, with nine lines printed under the brand, and none of them names glutamine. Absence from a list is not a failed test: Informed Sport certifies the products a company submits, so this records only that this product is not in the program's published list on that date.
Source: LGC (Informed Sport), Informed Sport product list, October 2026 PDF, as read October 3, 2026 · checked Oct 3, 2026
Informed Choice: not settled
LGC's own Informed Choice product list of October 2026, read on Oct 3, 2026, prints two glutamine lines under Optimum Nutrition: "ON Glutamine Powder", with no region, and "GLUTAMINE POWDER (India)". The same block marks some lines with a region, for example "(EU)", "(India)" and "(USA)", and gives "ON Glutamine Powder" none. Neither the panel image nor the front image the store publishes for this size shows an Informed Choice mark, so nothing we could read on the package says which region the line covers, and whether it covers the package sold in the United States cannot be read from the name. The list prints no package size. Unknown until LGC's own record for the line can be read.
The program's directory holds an entry (ON Glutamine Powder) that may cover this package. Whether it names this package is not settled either way, so this row is neither a listing nor an absence.
Source: LGC (Informed Choice), Informed Choice product list, October 2026 PDF, as read October 3, 2026 · checked Oct 3, 2026

No 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 heaping teaspoon
Active ingredient
L-glutamine: 5g as labeled
Printed on this size's own panel image (ONUS-glutamine-powder_Label_0-66lb_58-servings.jpg) as "L-Glutamine 5 g*" in a "Serving Size 5.15 g (About 1 Heaping Teaspoon)" serving, with "Serving Per Container 58". The comparison basis is grams of L-glutamine and the panel prints grams, so nothing is converted; the panel names L-glutamine and no other dietary ingredient. "OTHER INGREDIENTS: None." is printed below the panel. The front image the store's feed lists for this size prints "NET WT 10.58 OZ (300 G)" and "58 SERVINGS", which is what the net weight rests on. No gluten, vegan, vegetarian or allergen statement is printed, so each is Unknown.
Vegan
Unknown
Gluten free
Unknown
Allergens
Unknown
Other ingredients
None, as labeled
Label facts rest on: Optimum Nutrition, Supplement Facts panels: Optimum Nutrition Glutamine Powder, Unflavored, 58 and 194 servings · checked Oct 31, 2026

Other tracked packages

Same category and format and, where a category is compared by strength, the same labeled strength. Different recorded ingredient-form lists are kept separate. Ordered by container price before delivery; only fresh recorded prices are shown. Formulas, flavors and allergens may differ: check each label. These are browsing options, not recommended substitutes.

Compare all the L-glutamine we price, per 5g L-glutamine →

What this rests on: prices we last recorded at the retailer named on each product page, which go stale, and each page says when it was checked; the products we track, not every product sold, and Amazon and Walmart are not among the stores; listings and labels read at the source, each linked from the page. Found an error? Tell us. The full method: How we compare.