Is Thorne zinc NSF certified?
Our picks, by labeled strength, with a link to buy them: see where to buy. A strength with nothing certified at it has no pick, and is not listed there.
Partly: 1 of the 6 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 marked yes or no was read against NSF's own listing, with the listing ID shown; one row is not settled either way yet, and is marked that way, not as absent.
Thorne sells its zinc picolinate 30 mg in a bottle carrying the NSF mark and in a standard bottle, as separate items. The one listing prints a 60 count and a one-capsule serving, which fits both 60-count bottles, and is recorded against the marked one; the standard 60-count bottle is not settled either way, and the 180-count reads as listed at another size. The 15 mg picolinate and the bisglycinate have no listing.
| Product | Package | Named by an NSF listing? | Certificate |
|---|---|---|---|
| Zinc Picolinate 15 mg (60 capsules) buy | 60 capsules | No listing found | Unknown |
| Zinc Picolinate 30 mg (60 capsules) buy | 60 capsules | Not settled | Unknown |
| Zinc Picolinate 30 mg, NSF Certified for Sport (60 capsules) buy | 60 capsules | Yes | 1211643 |
| Zinc Picolinate 30 mg (180 capsules) buy | 180 capsules | Listed at another size | 1211643 |
| Zinc Bisglycinate 15 mg (60 capsules) buy | 60 capsules | No listing found | Unknown |
| Zinc Bisglycinate 30 mg (60 capsules) buy | 60 capsules | No listing found | Unknown |
What the listings say
Thorne holds 1 Certified for Sport listing covering the products in this table (1211643). 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.
3 products here have no NSF listing at all. That is an absence in a database, not a failed test: most supplements have never been independently tested, and NSF Certified for Sport is one program among several.
One product here is not settled either way yet. A listing may cover it; until that is settled against this exact package, the product page shows it as unchecked and it cannot be a pick. The card below says what the listing prints.
What each product page shows
Every Thorne product we track, across all categories: Is Thorne third party tested?
Where to buy: the pick for each type
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.
How these lines are chosen
Among 1 product and 1 retailer listing 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. No product here publishes a delivery rate below its free-delivery threshold, so the pick is priced before delivery.
How these lines are chosen
Among 2 products and 2 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. No product here publishes a delivery rate below its free-delivery threshold, so the pick is priced before delivery.
How these lines are chosen
Among 6 products and 6 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, and carry no recall or failed test. Nothing we track here is yet. Each of these misses at least one bar, and says which:
A pick has to be independently certified, at the exact package sold where the certifier names packages, and carry no recall or failed test. Nothing we track here is yet. Each of these misses at least one bar, and says which:
How these lines are chosen
Among 1 product and 1 retailer listing 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, and carry no recall or failed test. Nothing we track here is yet. Each of these misses at least one bar, and says which:
A pick has to be independently certified, at the exact package sold where the certifier names packages, and carry no recall or failed test. Nothing we track here is yet. Each of these misses at least one bar, and says which:
Full comparison of every product in this category: Zinc. 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.