Checked against public sources on August 4, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
Reviews arrived in a burst, not gradually. The dated series runs from 295 written reviews on August 4, 2025 to 330 on July 19, 2026. Up to 215 written reviews were added within a single ~30-day window — 65% of the total. …
“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.
| Magnesium (as Glycinate, Citrate, Malate) | 400 mg |
|---|
Printed on the package: NON-GMO · MADE WITH NON-GMO INGREDIENTS · GMP · PRODUCED IN COMPLIANT FACILITY · THIRD PARTY TESTED · LAB TESTED
We read only 1 line from this label, but the listing describes several ingredients. Treat this as an incomplete read rather than as the whole label.
The public sources did not settle the marketing promises on this label.
“GMP-certified” describes factory processes, not what is in the bottle. The claim does not name a certifier or public register that a shopper can check.
Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed.
Ingredient research can support context, but it is not a trial of this exact product.
No named laboratory or lot-specific certificate was found for this exact product. No exact brand product page was available for a document check. NSF, IFOS, USP, and Informed-Sport were not checked in this record. This is a public-evidence limit, not a finding that testing did not occur.
We looked and found no public proof. That does not count against the product.
PREMIUM CHELATED 400
Headlines first. Open evidence only when you want the source trail.
A count that moves steadily is ordinary. A sudden burst is what deserves a closer look.
The dated series runs from 295 written reviews on August 4, 2025 to 330 on July 19, 2026. Up to 215 written reviews were added within a single ~30-day window — 65% of the total. Sudden bursts are the usual fingerprint of incentivized or bought reviews; a steady climb is not.
Locked evidence record →Open the full source-linked findingEvery ingredient shows its real amount — nothing is hidden in a proprietary blend.
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 matches, so we are checking the right product rather than a look-alike.
UPCitemdb resolves 711841823504 to "Premium Chelated Magnesium Glycinate Malate Citrate (400mg | 180 Capsules) Max" (Zeal Naturals) — consistent with this listing.
Locked evidence record →Open the full source-linked findingThese are evidence gaps, not strikes against the product.
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.
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 400 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.
$0.44 per labeled serving
matching UPC/GTIN · checked Aug 5, 2026
View on Amazon ↗We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search iHerb ↗We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Target ↗We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Walmart ↗Only one exact price was available at build time; prices change by date, seller, and promotion.
No official brand storefront is confirmed in this record. That is neutral, but it prevents a direct brand-price, label, review, and document check.
Reference prices only · no affiliate links · every compared seller must publish the matching UPC/GTIN.
The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Record built August 04, 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.