Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed.

THORNE - Magnesium Bisglycinate - Powdered Magnesium…
Checked against public sources on July 27, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
2,572 ratings on a brand first claimed at an unstated date. The sales implied by the review count are worth weighing against how new or little-known the brand is. This is a plausibility question, not a fake-review verdict.
“Couldn’t verify” means we looked and found no public proof — not a mark against the product. Most supplement claims cannot be independently verified by anyone, so grey is the normal state of this industry.
What the Supplement Facts panel says
| Magnesium | 200 mg |
|---|
Printed on the package: NSF Certified for Sport · DAIRY FREE · SOY FREE · GLUTEN FREE
We read 1 lines from the package photograph. It is our transcript of the label, not the manufacturer’s panel, and it may be incomplete.
The checks, one by one
The public sources did not settle the marketing promises on this label.
◐Partly confirmed1
Ingredient research can support context, but it is not a trial of this exact product.
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
2,572 ratings on a brand first claimed at an unstated date.
The sales implied by the review count are worth weighing against how new or little-known the brand is. This is a plausibility question, not a fake-review verdict.
Evidence and sources
2,572 ratings, at a typical 1–2% review rate, implies roughly 128,600–257,200 units sold since the brand's first claimed use in an unstated date. Worth weighing whether that pace is plausible for a new, unknown label. The count is a documented fact; the conclusion is yours.
Locked evidence record →Open the full source-linked findingEvery ingredient shows its amount · 1 ingredients listed.
Every ingredient shows its real amount — nothing is hidden in a proprietary blend.
Evidence and sources
The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.
Locked evidence record →Open the full source-linked findingThe barcode identity checks out · 693749015130.
The barcode matches, so we are checking the right product rather than a look-alike.
Evidence and sources
Open Food Facts resolves 693749015130 to "Magnesium Bisglycinate" (Thorne) — consistent with this listing.
Locked evidence record →Open the full source-linked findingReviews rose from 5 to 29 between November 19, 2025 and June 29, 2026 — no sudden jump.
A count that moves steadily is ordinary. A sudden burst is what deserves a closer look.
Evidence and sources
Written reviews rose from 5 to 29 between November 19, 2025 and June 29, 2026. The largest rise inside any single 30-day window was about 9, so the count moved in steps rather than in one burst.
Locked evidence record →Open the full source-linked findingWhat remains open 2
- No FDA recall matched this brand in the current search.
- We have not found a public label filing for this exact product.
These are evidence gaps, not strikes against the product.
Filed address
25820 Highway 2 West, Sandpoint, IDAHO 83864, UNITED STATES
USPTO identifies the public owner or applicant behind this brand wordmark. This does not by itself identify the product manufacturer or prove where the product was made. Open USPTO source ↗
Dose and research context
We could not match an amount on this product to a studied range for the same ingredient, so these links are ingredient background rather than a measurement of this product.
What the research says about these amounts
Not a score. Studies disagree with each other and change over time, so this sits beside the evidence rather than counting toward it — it is here so you can read the sources yourself.
The panel lists 200 mg of magnesium per serving. Studies we found used 200 mg–420 mg a day, so this sits inside that range.
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
Price check for this exact product
Amazon
Exact UPC/GTIN match$1.57 per labeled serving
matching UPC/GTIN · checked Jul 27, 2026
View on Amazon ↗Target
Exact UPC/GTIN match$1.57 per labeled serving
matching UPC/GTIN · checked Jul 27, 2026
View on Target ↗iHerb
Exact UPC/GTIN match$1.57 per labeled serving
matching UPC/GTIN · checked Jul 27, 2026
View on iHerb ↗Walmart
Not confirmedWe only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Walmart ↗Same UPC/GTIN observed across 3 sellers at the same price at check time.
Reference prices only · no affiliate links · every compared seller must publish the matching UPC/GTIN.
Want to inspect the evidence?
The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Record built July 27, 2026. Sources: source listing observed at check time · USPTO Trademark Search · Keepa exact-listing history · NIH / published research · certification and regulator records where available. LookCloser publishes evidence and gaps; it does not advise for or against any supplement. Evidence-based corrections welcome.