DeliveredDose

Is BulkSupplements L-glutamine NSF certified?

Latest price check:

Partly: 4 of the 9 BulkSupplements L-glutamine packages we track, not all of them. NSF lists a specific package against each certificate, and a certificate is what NSF actually stands behind, so a package the listing does not name is treated as unconfirmed rather than certified. Every row below marked yes or no was checked against NSF's directory, with the listing ID shown where a listing names the product; 4 rows are not settled either way yet, and are marked that way, not as absent.

Each flavored 700 g bag has a listing of its own that names it. One more listing names the unflavored powder at 100 g, 250 g, 500 g and 1 kg, but it prints a smaller serving than the bags’ own panel does, so whether it names those bags as labeled is not settled either way. No listing names the capsules.

ProductPackageNamed by an NSF listing?Certificate
L-Glutamine 5,000 mg (360 capsules) buy360 capsulesListing names another form1797920
L-Glutamine Powder, Unflavored (100 g) buy100 gNot settled1797920 (may cover this; not settled)
L-Glutamine Powder, Unflavored (250 g) buy250 gNot settled1797920 (may cover this; not settled)
L-Glutamine Powder, Unflavored (500 g) buy500 gNot settled1797920 (may cover this; not settled)
L-Glutamine Powder, Orange Smash (700 g) buy700 gYes1825992
L-Glutamine Powder, Mango Tango (700 g) buy700 gYes1825995
L-Glutamine Powder, Lemon Italian Ice (700 g) buy700 gYes1825994
L-Glutamine Powder, Sour Apple (700 g) buy700 gYes1825993
L-Glutamine Powder, Unflavored (1 kg) buy1 kgNot settled1797920 (may cover this; not settled)

What the listings say

The records here rest on 5 Certified for Sport listings (1797920, 1825992, 1825995, 1825994, 1825993). NSF records some brands under more than one spelling, so a search on the brand name alone can miss a listing; ours are found from a full read of the directory, then opened one by one.

4 products here are not settled either way yet. A listing may cover them; until that is settled against this exact package, the product page shows them as unchecked and none of them can be a pick. The card below says what the listing prints.

What each product page shows

L-Glutamine 5,000 mg (360 capsules) A? · Listing names another form
NSF's Certified for Sport directory, read in full on Oct 30, 2026, carries five Bulk Supplements rows naming glutamine. One, 1797920 "L GLUTAMINE" (opened the same day), prints Product Form Powder and Package Size "100 g, 250 g, 500 g, and 1kg"; the other four are the 700 g flavored powders. No row names a capsule. The 360-capsule bottle priced here is the same ingredient in another form and is on no listing, so the certification is shown as naming another form, not as covering this package. No face of this bottle prints an NSF mark.
Listing 1797920 "L GLUTAMINE", Bulk Supplements, read on Oct 30, 2026, prints Product Form Powder, Package Size "100 g, 250 g, 500 g, and 1kg" and Serving Size "2 tsp (~4 g)". The store sells this bag as "Powder / 100 Grams (3.5 oz)", a weight the listing names, and the 500 g bag's panel, which this bag is entered from, prints "Serving Size: 2 tsp (about 5 grams)". The label image the listing itself files prints the same "2 tsp (about 5 grams)" serving and "L-Glutamine 5g". The package weight matches and the serving weight on the listing differs from the label's, so whether the listing names this package as it is labeled is not settled either way. No image the store publishes of this bag shows an NSF mark.
Listing 1797920 "L GLUTAMINE", Bulk Supplements, read on Oct 30, 2026, prints Product Form Powder, Package Size "100 g, 250 g, 500 g, and 1kg" and Serving Size "2 tsp (~4 g)". The store sells this bag as "Powder / 250 Grams (8.8 oz)", a weight the listing names, and the 500 g bag's panel, which this bag is entered from, prints "Serving Size: 2 tsp (about 5 grams)". The label image the listing itself files prints the same "2 tsp (about 5 grams)" serving and "L-Glutamine 5g". The package weight matches and the serving weight on the listing differs from the label's, so whether the listing names this package as it is labeled is not settled either way. No image the store publishes of this bag shows an NSF mark.
Listing 1797920 "L GLUTAMINE", Bulk Supplements, read on Oct 30, 2026, prints Product Form Powder, Package Size "100 g, 250 g, 500 g, and 1kg" and Serving Size "2 tsp (~4 g)". This bag's front prints "NET WT. 17.6 oz (1.1 lb) (500 g)", a weight the listing names, and this bag's own panel prints "Serving Size: 2 tsp (about 5 grams)". The label image the listing itself files prints the same "2 tsp (about 5 grams)" serving and "L-Glutamine 5g". The package weight matches and the serving weight on the listing differs from the label's, so whether the listing names this package as it is labeled is not settled either way. No image the store publishes of this bag shows an NSF mark.
Listing 1825992 "L GLUTAMINE Orange Smash", Bulk Supplements, read on Oct 30, 2026, prints Product Form Powder, Flavor Orange, Package Size "700 g" and Serving Size "3 tsp (~7 g)". The bag priced here prints "ORANGE SMASH FLAVORED" and "NET WT. 24.7 OZ (1.54 LB) (700 G)" on its front and "Serving Size: 3 tsp (about 7 grams)" with "Servings per container: 100" on its panel. The listing names the weight on the label and the serving on the label, so it names the package sold. The label image the listing files prints "Serving Size: 3 tsp (about 7g)", "Servings per container: 100" and "L-Glutamine 5g", the same figures. No image the store publishes of this bag shows an NSF mark.
Listing 1825995 "L GLUTAMINE Mango Tango", Bulk Supplements, read on Oct 30, 2026, prints Product Form Powder, Flavor Mango, Package Size "700 g" and Serving Size "3 tsp (~7 g)". The bag priced here prints "MANGO TANGO FLAVORED" and "NET WT. 24.7 OZ (1.54 LB) (700 G)" on its front and "Serving Size: 3 tsp (about 7 grams)" with "Servings per container: 100" on its panel. The listing names the weight on the label and the serving on the label, so it names the package sold. The label image the listing files prints "Serving Size: 3 tsp (about 7g)", "Servings per container: 100" and "L-Glutamine 5g", the same figures. No image the store publishes of this bag shows an NSF mark.
Listing 1825994 "L GLUTAMINE Lemon Italian Ice", Bulk Supplements, read on Oct 30, 2026, prints Product Form Powder, Flavor Lemon, Package Size "700 g" and Serving Size "3 tsp (~7 g)". The bag priced here prints "LEMON ITALIAN ICE FLAVORED" and "NET WT. 24.7 OZ (1.54 LB) (700 G)" on its front and "Serving Size: 3 tsp (about 7 grams)" with "Servings per container: 100" on its panel. The listing names the weight on the label and the serving on the label, so it names the package sold. The label image the listing files prints "Serving Size: 3 tsp (about 7g)", "Servings per container: 100" and "L-Glutamine 5g", the same figures. No image the store publishes of this bag shows an NSF mark.
Listing 1825993 "L GLUTAMINE Sour Green Apple", Bulk Supplements, read on Oct 30, 2026, prints Product Form Powder, Flavor Fruit - Other, Package Size "700 g" and Serving Size "3 tsp (~7 g)". The bag priced here prints "SOUR GREEN APPLE FLAVORED" and "NET WT. 24.7 OZ (1.54 LB) (700 G)" on its front and "Serving Size: 3 tsp (about 7 grams)" with "Servings per container: 100" on its panel. The listing names the weight on the label and the serving on the label, so it names the package sold. The label image the listing files prints "Serving Size: 3 tsp (about 7g)", "Servings per container: 100" and "L-Glutamine 5g", the same figures. NSF names the flavor "Sour Green Apple", the bag front prints "SOUR GREEN APPLE FLAVORED", and the store titles the page "L-Glutamine Powder - Sour Apple"; all three are this bag. No image the store publishes of this bag shows an NSF mark.
Listing 1797920 "L GLUTAMINE", Bulk Supplements, read on Oct 30, 2026, prints Product Form Powder, Package Size "100 g, 250 g, 500 g, and 1kg" and Serving Size "2 tsp (~4 g)". The store sells this bag as "Powder / 1 Kilogram (2.2 lbs)", a weight the listing names, and the 500 g bag's panel, which this bag is entered from, prints "Serving Size: 2 tsp (about 5 grams)". The label image the listing itself files prints the same "2 tsp (about 5 grams)" serving and "L-Glutamine 5g". The package weight matches and the serving weight on the listing differs from the label's, so whether the listing names this package as it is labeled is not settled either way. No image the store publishes of this bag shows an NSF mark.

Every BulkSupplements product we track, across all categories: Is BulkSupplements third party tested?

Where to buy: the L-glutamine shortlist

The pick is the cheapest product that clears four bars:

  • certified, and named at the exact package where the certifier names packages
  • no adverse finding on record
  • a price its retailer let us read recently
  • no more than a year’s supply at the label’s serving

It is ranked per delivered dose where the retailer publishes a delivery rate. Where none does, it is the cheapest such product before delivery, and it says how far the order is from free delivery. It is the same pick the category page shows. Any other answer beside it is the cheapest under a different rule, and its own line names that rule. Answers that cost more than the pick are folded into one line until you open it.

Powder
Our pick, delivery included
Thorne L-Glutamine Powder (90 servings)
$0.744per 5g, delivered$22.33 a month
A · CertifiedA · NSF Certified for SportBuy at Thorne (direct) · $67.00
Cheapest per 5g, delivery known · Cheapest independently tested, delivery known
Sports Research L-Glutamine, Unflavored (500 g)
$0.355per 5g, delivered$10.64 a month
Not our pick: its price was last read Nov 4, 2026 and we cannot refresh it automatically.
Last known price, Nov 4, 2026; we have no automatic way to refresh Sports Research (direct)'s prices.
Cheapest independently tested, delivery not published
BulkSupplements.com L-Glutamine Powder, Mango Tango (700 g)
$0.34per 5g, before delivery$10.19 a month
Not our pick: delivery cost is not published.
Delivery is extra and not published; free from $59.01.
A · CertifiedA · NSF Certified for SportBuy at BulkSupplements.com · $33.97
How these lines are chosen

Among 27 products and 27 retailer listings we track; Amazon and Walmart are not included. A month is thirty doses of 5g, priced the same way as the figure beside it. It is worked out before that figure is rounded, so it can differ from thirty times it by a few cents. It is not thirty servings where a serving holds more or less than 5g. “Delivery known” ranks only products whose retailer publishes a delivery rate. A cheaper tested product whose rate is not published gets a line of its own. Every package we price, with its delivery terms, is on the L-Glutamine page.

Capsules, softgels and tablets
Cheapest per 5g, delivery known
Optimum Nutrition Glutamine Capsules (240 capsules)
$1.21per 5g, delivered$36.23 for thirty doses of 5g
D · None locatedD · None locatedBuy at Optimum Nutrition (direct) · $22.99
How these lines are chosen

Among 5 products and 5 retailer listings we track; Amazon and Walmart are not included. A month is thirty doses of 5g, priced the same way as the figure beside it. It is worked out before that figure is rounded, so it can differ from thirty times it by a few cents. It is not thirty servings where a serving holds more or less than 5g. “Delivery known” ranks only products whose retailer publishes a delivery rate. Every package we price, with its delivery terms, is on the L-Glutamine page.

No pick yet. These came closest

A pick has to clear four bars:

  • independently certified, and named at the exact package where the certifier names packages
  • no recall or failed test
  • a price its retailer let us read recently
  • no more than a year’s supply at the label’s serving

Where the retailer publishes no delivery rate, the pick is priced before delivery and says so. Nothing we track here clears all of those yet. Each of these misses at least one bar, and says which:

BulkSupplements.com L-Glutamine 5,000 mg (360 capsules) $0.433 per 5g, before delivery, its only listing names the same ingredient in another form. Free delivery starts at $59.01, so this order is $33.04 short.
Nutricost L-Glutamine 800 mg (180 capsules) $0.624 per 5g, before delivery, no independent verification we could locate. Free delivery starts at $59.01, so this order is $41.04 short.
Optimum Nutrition Glutamine Capsules (240 capsules) $1.21 per 5g, delivered, no independent verification we could locate. Free delivery starts at $75.01, so this order is $52.02 short.
More questions like this

Full comparison of every product in this category: L-Glutamine. Every question we answer: the question index.

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.