Is Thorne collagen NSF certified?
Partly: 1 of the 2 Thorne collagen peptides 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 was read against NSF's own listing, and the listing ID is shown.
| Product | Package | Named by an NSF listing? | Certificate |
|---|---|---|---|
| Collagen Fit, Unflavored (30 servings) buy | 30 servings | Yes | 1502565 |
| Collagen Plus, Passion Berry (30 servings) buy | 30 servings | No listing found | None found |
What the listings say
The records here rest on 1 Certified for Sport listing (1502565). 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.
One product here has no NSF Certified for Sport listing. That is an absence in a database, not a failed test: these programs certify what a company submits to them, and NSF Certified for Sport is one program among several. Its label prints NSF's Contents Certified mark, which belongs to a different NSF program, one this page does not read.
What each product page shows
Every Thorne product we track, across all categories: Is Thorne third party tested?
Where to buy: the collagen peptides shortlist
The pick is the cheapest certified product, at the exact package sold where the certifier names packages, with no adverse finding on record, a price its retailer let us read recently, and no more than a year’s supply at the label’s serving; 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 answer shown beside it is the cheapest under a different rule and says so on its own line; answers that cost more than the pick fold under one line until you ask for them.
How these lines are chosen
Among 44 products and 44 retailer listings we track; Amazon and Walmart are not included. A month is thirty doses of the size in the heading, priced the same way as the per-dose figure beside it. “Delivery known” ranks only products whose retailer publishes a delivery rate; a cheaper product with an unpublished rate is on its own line, or in the full list below.
A pick has to be independently certified, at the exact package sold where the certifier names packages, with no recall or failed test, a price its retailer let us read recently, and 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. This one misses at least one bar, and says which:
Full comparison of every product in this category: Collagen Peptides. Every question we answer: the question index.
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.