Thorne L-Glutamine (90 capsules)
Label read Oct 30, 2026. Where the data comes from
Is Thorne L-glutamine NSF certified? · Is Thorne third party tested? · Which L-glutamine brands are third-party tested?
Comparing with a package we do not list? Cost per dose calculator
Cost
- Printed on this bottle's own panel image as "L-Glutamine 500 mg" in a "Serving Size: One Capsule" serving, headed "One Capsule Contains:". We compare grams, so 500 mg is recorded as 0.5 g (500 / 1,000). The 5 g comparison dose is ten of this label's servings, ten capsules. The panel names one ingredient and no other active. The panel image carries no servings-per-container line; the page's ingredient block prints "Servings Per Container: 90" and the front prints "90 CAPSULES", which is the figure recorded here. The side face's GLUTEN FREE mark and the page's "Gluten Free" badge are what the gluten free answer rests on; no vegan or vegetarian claim is made.
Delivery
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
- $26.00
- Delivery
- Free
- Order total, before tax
- $26.00
- Per 5g L-glutamine, delivery included
- $2.89
90 labeled servings in this order. Comparison doses are a price yardstick, not advice about how much to take.
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 Ground shipping on all retail orders within the contiguous United States, with no minimum order value, from Thorne's shipping FAQ, first read August 31, 2026 and read again on September 18, 2026 with the same terms. Alaska and Hawaii are excluded: free above $300, otherwise a variable fee with a $30 minimum. Wholesale terms differ ($200 minimum, $11.95 below it) and are not what this site prices. With no threshold to clear, delivered cost within the contiguous US equals the price at any cart size. Read again on October 30, 2026 with the same terms.
Where to buy
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 current 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: $26.00 at Thorne (direct), checked . Unchanged since we started checking on Oct 30 (16 checks).
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 level A?: Listing names another form
A certification program lists this brand’s same ingredient in another form, and no listing names the form priced here, so we do not present it as a certification of this package. The listing, and exactly what it names, is set out below.
- The NSF Certified for Sport listing names another form: a powder, not the capsule shown here, so it does not cover this package. NSF's Certified for Sport directory, read in full on Oct 30, 2026 (2,593 listings), carries 69 Thorne rows, filed under "Thorne" and "Thorne®". Two name glutamine, 1509493 and 1204614 (both opened the same day), and both are "Thorne® L-Glutamine Powder", Product Form Powder, Package Size "504 g": the powder tub, which Thorne sells as its own product under its own SKU. No row names a capsule. The 90-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. The label on this bottle prints NSF's Contents Certified mark, which is a different NSF program and is recorded as the maker's claim on the product, not as a listing here.
- Testing claim we recorded, and where it appeared: NSF Contents Certified mark printed on the label's side face. That is NSF's contents certification, a different program from NSF Certified for Sport, and Thorne's store page makes no Certified for Sport claim for this package. NSF’s Contents Certified listings were not searched for this product, so the claim is not checked here either way.
- Checked USP Verified database on Sep 21, 2026: not listed.
What NSF Certified for Sport checks
| Confirms the label’s dose | Yes |
| Tests for heavy metals / contaminants | Yes |
| Screens for substances banned in sport | Yes |
| Reviews manufacturing | On-site audit |
| Testing frequency | Periodic |
No laboratory report with figures is recorded here for this product.
Label
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.