Ordered by price, lowest first, and labeled so you can see what each link earns us. Commission is never an input to that ordering. If the cheapest retailer pays us nothing, that is still the one we send you to. No link on this page earns us anything; every Buy button is a plain retailer link.
Verification, Tier D: Could not locate independent data
We could not locate independent testing or certification for this product. That is a statement about our search, not about the product. These programs certify what a company submits to them, so a product can be absent simply because it was never entered, which is not a finding against it. Which certifier databases we searched, and when, is listed below. Where a program is not listed there, we have not checked it and do not imply anything either way.
Searched 4 certifier databases and found no listing for this product, and located no published test results. A program not named below was not checked for this product.
The testing claim we recorded for this product, with where it appeared: "Third Party Tested" (statement printed on the label image, naming no program). It names no program this site grades, so there is no listing to open against it, and it does not raise the verification level.
Checked NSF Certified for Sport database on Sep 18, 2026: not listed.
Checked USP Verified database on Sep 21, 2026: not listed.
NSF Certified for Sport: checked, not listed
Checked and absent. The full Certified for Sport directory read of Sep 18, 2026 holds two Sports Research rows, both creatine, and no magnesium glycinate row for this brand. Absence from a database is not a failed test.
Checked and absent. USP's own Verified Products directory was read page by page in a browser on Sep 21, 2026: 16 pages, 159 products, 16 brands, captured in this site's directory snapshot. This brand does not appear in the directory or in its brand facet, and no product in it names this brand. USP verifies the products a company submits to it, so this records which products were submitted and nothing else. Absence from a database is not a failed test.
Sports Research is on LGC's own Informed Sport product list of September 2026 with 7 product lines, read in full on Sep 24, 2026, and none of them names this product. Absence from a list is not a failed test: Informed Sport certifies the products a company submits, so this records only that this product is not in the program's published list on that date.
Sports Research is on LGC's own Informed Choice product list of September 2026 with 10 product lines, read in full on Sep 24, 2026, and none of them names this product. Absence from a list is not a failed test: Informed Choice certifies the products a company submits, so this records only that this product is not in the program's published list on that date.
No laboratory report with figures is recorded here for this product.
Not established: Heavy-metal testing, Label-accuracy testing.
Absence of data is not evidence that a product is clean. It means we found no published result for that testing.
Label
Form
softgel
Serving size
2 softgels
Active ingredient
Magnesium Glycinate: 160mg as labeled
Elemental magnesium as printed on this package's own Supplement Facts panel (FG496A, Servings Per Container: 60): "Magnesium (from 1441 mg chelated magnesium glycinate) 160 mg" per 2-softgel serving. Not derived from the compound weight. The panel names one salt and no second salt. This is a softgel with an oil carrier (coconut MCT oil) in a gelatin capsule, so the product is not vegan.
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.