Which collagen brands are third-party tested?

8 of the 33 collagen peptides products we track have their exact package named by a certifier. 6 more are certified by production batch instead, which names no package. Another 4 come from a product line a certifier lists, but at a package size the certificate does not name. The remaining 15 appear in no database we searched.

A certifier lists a specific package against each certificate. A brand can sell the same formula in several sizes, or several flavors, and have one of them listed, so “this brand is NSF certified” can be true while the tub in your hand is not the tub NSF tested. The middle group below is that gap.

A collagen label prints two figures that are easy to confuse: the grams of collagen peptides in the ingredient line, which this site prices on, and a protein figure a gram or two below it. NSF lists tubs by size, so a 20 oz tub can be named while the 10 oz beside it is not. Each row names the source its own panel prints.

Certifier names this exact package, 8

The strongest evidence available here. For NSF, the listing names the package size sold; it was opened, its package text recorded, and its ID is on the product page. For USP, which names products rather than packages, the product is in USP's directory and the USP Verified Mark is on this package's own label, and both are on the product page.

Certified batch by batch, no package named, 6

Certified, but by production batch rather than by package: Informed Sport, Informed Choice and IFOS test and report lot by lot, so their listings name no tub, bottle or count. That is real independent testing of the product; it is not a statement that the package in your hand was the one tested.

Listed, but not at this size, 4

The brand and product appear in the database at a different package size. Not a failure, and not a confirmation either.

Searched, and not found, 15

Not listed by NSF Certified for Sport when we read its full directory. These programs certify what a company submits to them, so a product can be absent from the database simply because it was never entered, which is not a finding against it.

NSF Certified for Sport, the Informed programs' published product lists, the IFOS directory and USP's directory are each read in full, and each product page names the day. A product missing from this page has not failed a check. It has not had one.

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.