The best third-party-tested magnesium glycinate, by certification listing
Last reviewed 2026-10-13. Every certification listing, label and Amazon seller below was read from its source on that date, and each links it. No price is shown.
2 magnesium glycinate products sold as an exact Amazon listing are on a third-party certification list: Nature Made High Absorption Magnesium Glycinate 200 mg, 180 capsules (USP Verified) and Thorne Magnesium Bisglycinate powder, unflavored, 7.98 oz (226.2 g), about 60 servings (NSF Certified for Sport). Life Extension and Doctor's Best magnesium glycinate are on none of the four lists checked on Oct 13, 2026: NSF Certified for Sport (2,570 listings), USP Verified (more than 160 products), Informed Sport and Informed Choice.
What this page does not say. It states certification listings and label facts only. It says nothing about what magnesium does or about any effect of a product, and it gives no dose advice.
What “third-party tested” means here
- NSF Certified for Sport lists each certified product with its package size, serving size and the lot numbers the certification covers. On Oct 13, 2026 the list had 2,570 listings; 16 of them had “glycinate” or “bisglycinate” in the product name.
- USP Verified: USP's list names each verified product. It gives no lot numbers. The Nature Made label says USP has tested and verified its ingredients, potency and manufacturing process.
- The order is by brand. This is not a quality or effectiveness ranking, and no price is shown.
- A listing is not a lot report. No public lot-by-lot test result, like the IFOS reports for fish oil, was found for any magnesium product.
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| Product | Certification | Listing | Label, per serving | Amazon seller (read) | |
|---|---|---|---|---|---|
| Nature Made High Absorption Magnesium Glycinate 200 mg, 180 capsules | USP Verified | USP Verified list | 2 capsules: 200 mg magnesium as magnesium biglycinate. | Sold by Amazon.com (Oct 13, 2026) | Amazon → |
| Thorne Magnesium Bisglycinate powder, unflavored, 7.98 oz (226.2 g), about 60 servings | NSF Certified for Sport | NSF listing 1507934 | 1 scoop (3.77 g): 200 mg magnesium as magnesium bisglycinate. Other ingredients: citric acid, monk fruit extract. About 60 servings. | Sold by Pattern., shipped by Amazon (Oct 13, 2026) | Amazon → |
No price is shown: prices change, and the price at the store is the one to check. The Thorne buy box: Pattern. is a marketplace seller, not Thorne and not Amazon.com. It is the agency that runs Thorne's Amazon store.
On a list, but not linked
- Klean Athlete Klean Magnesium, 90 vegetarian capsules: NSF Certified for Sport, NSF listing 1572352; label 1 capsule: 120 mg magnesium as magnesium glycinate. Not linked: On Amazon (B086K54TZH, read 2026-10-13) the buy box is a marketplace seller, Pattern., not Klean Athlete or Amazon.com.
- Momentous Magnesium Bisglycinate, 60 capsules: NSF Certified for Sport, NSF listing 1808823; label 2 capsules: 200 mg magnesium as magnesium bisglycinate. Not linked: An Amazon search on 2026-10-13 showed no listing for this product alone, only a blend with other ingredients.
- Designs for Sport Magnesium Bisglycinate, 120 capsules: NSF Certified for Sport, NSF listing 1479832; label 2 capsules per serving (NSF listing). Not linked: No Amazon listing was read for this product.
- Codeage Liposomal Magnesium Glycinate: NSF Certified for Sport, NSF listing 1785061; label 4 capsules: 350 mg magnesium as magnesium bisglycinate chelate and magnesium oxide. Not linked: The label is a blend of magnesium glycinate and magnesium oxide, so it is not a magnesium glycinate product alone.
- BulkSupplements Magnesium Glycinate powder, 1 kg: NSF Certified for Sport, NSF listing 1809763; label 3/4 tsp (about 2.2 g): 300 mg magnesium as magnesium glycinate and magnesium oxide. Not linked: The label is a blend of magnesium glycinate and magnesium oxide, so it is not a magnesium glycinate product alone.
On none of the four lists
- Life Extension Magnesium Glycinate, 90 vegetarian capsules (item 02535) (Amazon ASIN B0DMTV24LR): no Life Extension product on the NSF Certified for Sport list; no Life Extension product on the USP Verified list; a search for Life Extension on Informed Sport and on Informed Choice returned no results. Is Life Extension magnesium glycinate third-party tested?
- Doctor's Best High Absorption Magnesium Glycinate Lysinate, 240 count (Amazon ASIN B000BD0RT0): no Doctor's Best product on the NSF Certified for Sport list; no Doctor's Best product on the USP Verified list; a search for Doctors Best on Informed Sport and on Informed Choice returned no results.
Not being on these lists is not a finding that a product is untested or that a lot failed. It means only that no public listing exists to compare.
For fish oil, see the best third-party-tested fish oil.
This page restates published certification listings and labels with attribution. It makes no health, benefit or treatment claim, gives no dosing advice, and says nothing about whether any product is safe or right for you.
Links to Amazon on this page are affiliate links: as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Which products appear, and their order, was settled by the certification listings before any link was attached. Price plays no part.
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