$14.97 per container, before delivery
$0.249 per 5g L-glutamine, before delivery
$7.50 delivery
Price checked Oct 30, 2026.
Buy at Sports Research (direct) →Label, prices & sources →Double Wood Supplements L-Glutamine Powder, Unflavored (500 g)
D · None located
Label read Oct 30, 2026. Where the data comes from
Which L-glutamine brands are third-party tested?
Cost
$0.249
per 5g L-glutamine
$24.95
per container · Double Wood Supplements (direct)
$7.49
a month at one dose a day
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
$0.249
- Printed on this tub's own Supplement Facts panel image as "L-Glutamine 5g †" in a "Serving Size: 5g (Approx. 1 Scoop)" serving, with "Servings per Container: 100 Servings"; the tub photo prints the same line as "L-Glutamine 5 g †". 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, and prints no Other Ingredients line, so the additives are Unknown. The front prints "NET WT 1.1 lbs. (500 grams)" and "100 SERVINGS". The side of the tub prints "GLUTEN FREE" and "SOY FREE" badges, which are what gluten free and the soy row rest on; no label face prints a vegan or vegetarian claim, so both are Unknown.
Delivery
Delivery cost
Applies, amount not published
Delivery is NOT free on this order. It is $5.05 below the $30.00 threshold, and this retailer does not publish a rate, so we cannot tell you what it will add. Free shipping on orders over $30, from the shipping policy page, first read September 1, 2026: "We currently offer the following shipping methods: Free Shipping for orders over $30, Standard Shipping for orders under $30". The page read "Free Shipping for orders over $30" again on September 26, 2026. The standard rate itself is not published, so delivered cost below $30 is Unknown. Read again on October 30, 2026 with the same terms.
Cost per dose delivered
at least $0.249
We will not put a number on this. The product price is a floor, not the price you will pay. Reaching the free-delivery threshold, or choosing a retailer that publishes its rate, is the only way to know in advance.
To get free delivery
Spend $5.05 more at Double Wood Supplements (direct)
Delivery policy: Double Wood Supplements, Double Wood Supplements shipping policy, re-read October 30, 2026 · checked Oct 30, 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
- $24.95
- Delivery
- Unknown
- At least, before delivery & tax
- $24.95
- Per 5g L-glutamine, before delivery
- $0.249
100 labeled servings in this order. Comparison doses are a price yardstick, not advice about how much to take.
Delivery is extra; the retailer has not published a rate we can apply.
Unit price checked Oct 30, 2026.
View this package at Double Wood Supplements (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 over $30, from the shipping policy page, first read September 1, 2026: "We currently offer the following shipping methods: Free Shipping for orders over $30, Standard Shipping for orders under $30". The page read "Free Shipping for orders over $30" again on September 26, 2026. The standard rate itself is not published, so delivered cost below $30 is Unknown. Read again on October 30, 2026 with the same terms.
Where to buy
Double Wood Supplements (direct) · lowest recorded available price
we earn nothing on this link
checked today$24.95Buy
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: $24.95 at Double Wood Supplements (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: Could not locate independent data
We could not locate independent testing or certification for this product. That is a statement about our search, not about the product. These programs certify what a company submits to them, so a product can be absent simply because it was never entered, which is not a finding against it. 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 for this product, and located no published test results. A program not named below was not checked for this product.
- The testing claim we recorded for this product, with where it appeared: "Third-Party Tested" (mark printed on the Supplement Facts panel image, naming no program). It names no program this site grades, so there is no listing to open against it, and it does not raise the verification level.
- 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 no row filed under Double Wood Supplements, in this category or any other; none of the 14 listings whose product name contains "glutamine" is this brand's. The label on 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 (Nutricost, Micro Ingredients and Double Wood Supplements, L-glutamine) · checked Oct 30, 2026USP 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, 2026Informed Sport: checked, not listed
Double Wood Supplements does not appear as a brand in LGC's own Informed Sport product list of October 2026, 497 brands and 1,887 product lines, as read on Oct 3, 2026. Absence from a list is not a failed test: Informed Sport certifies the products a company submits, so this records only that none from this brand is 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, 2026Informed Choice: checked, not listed
Double Wood Supplements does not appear as a brand in LGC's own Informed Choice product list of October 2026, 201 brands and 853 product lines, as read on Oct 3, 2026. Absence from a list is not a failed test: Informed Choice certifies the products a company submits, so this records only that none from this brand is in the program's published list on that date.
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 tub's own Supplement Facts panel image as "L-Glutamine 5g †" in a "Serving Size: 5g (Approx. 1 Scoop)" serving, with "Servings per Container: 100 Servings"; the tub photo prints the same line as "L-Glutamine 5 g †". 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, and prints no Other Ingredients line, so the additives are Unknown. The front prints "NET WT 1.1 lbs. (500 grams)" and "100 SERVINGS". The side of the tub prints "GLUTEN FREE" and "SOY FREE" badges, which are what gluten free and the soy row rest on; no label face prints a vegan or vegetarian claim, so both are Unknown.
Vegan
Unknown
Gluten free
Yes
Allergens
free of soy
Other ingredients
Unknown
Label facts rest on: Double Wood Supplements, Supplement Facts panel and tub faces: Double Wood Supplements L-Glutamine Powder, unflavored, 500 g · checked Oct 30, 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.
$16.99 per container, before delivery
$0.283 per 5g L-glutamine, before delivery
Delivery extra; amount unknown
Price checked Oct 30, 2026.
Buy at MuscleTech (direct) →Label, prices & sources →$17.97 per container, before delivery
$0.359 per 5g L-glutamine, before delivery
Delivery extra; amount unknown
Price checked Oct 30, 2026.
Buy at Nutricost (direct) →Label, prices & sources →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.