Is Sports Research L-glutamine third party tested?
Latest price check:
Yes. Informed Sport lists the Sports Research L-glutamine we track, in both sizes. We also searched NSF Certified for Sport, USP Verified and Informed Choice and found no listing.
Informed Sport’s published list, the one these tubs were read against, prints a brand and a product line and nothing more: no package size, flavor, batch or certificate number. So a listing here says the line is in the program, not that this tub was tested. Both tubs’ labels print the Informed Sport mark.
| Size | Per 5 g, before delivery | NSF Certified for Sport | Informed Sport |
|---|---|---|---|
| 60 servings (last known price, Nov 4) check price | $0.25 | No listing found | Listed |
| 100 servings (last known price, Nov 4) check price | $0.28 | No listing found | Listed |
A missing listing is an absence in a database, not a failed test. These programs certify what a company submits to them, so an absence records what was submitted, not anything found in the product.
The programs check different things: NSF Certified for Sport vs Informed Sport vs Informed Choice. Every brand in this category, by program: Which L-glutamine brands are third-party tested?
Every Sports Research product we track, across all categories: Is Sports Research 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.
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.
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.
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:
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.