Checked against public sources on July 24, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
Package and trademark records name different responsible entities. The package says manufactured for: Nature Bell, 4380 Mission Blvd, Montclair, CA 91763. USPTO names Nature Bell, Inc. as the exact wordmark owner. That can be a normal distributor, manufacturer, or licensing…
“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.
| Vitamin C (as ascorbyl palmitate) | 20 mg |
|---|---|
| Magnesium (as magnesium glycinate) | 90 mg |
| Magnesium Glycinate | 500 mg |
Printed on the package: Double Sealed · UV Protected Amber Bottle · Third-Party USA Lab Tested · LAB TESTED · cGMP · GMO FREE · Vegetarian · vitamin angels
We read 3 lines from the package photograph. It is our transcript of the label, not the manufacturer’s panel, and it may be incomplete.
The public sources did not settle the marketing promises on this label.
No named laboratory or lot-specific certificate was found for this exact product. A related brand page repeats a testing claim but names no issuer; its UPC is not published. 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.
“Made in USA” can describe only final bottling. Ingredient-sourcing records were not located for this product.
We looked and found no public proof. That does not count against the product.
superior absorption
Headlines first. Open evidence only when you want the source trail.
The label promise and the Supplement Facts amount agree.
The listing claims 90 mg; the photo-read Supplement Facts panel shows Magnesium (as magnesium glycinate) at 90 mg per serving — the listing text and its photo-read panel agree; this is internal consistency, not independent testing.
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 findingFiled address
4951 Holt Blvd, Suite C, Montclair, California 91763, 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 ↗
The label amount is shown beside the range used in the linked ingredient studies.
90 mg per serving — below the 200–420 mg/day used in the linked studies.
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 90 mg of magnesium per serving. Studies we found used 200 mg–420 mg a day, so this sits below that range.
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
Open related seller leads before buying, then confirm the flavor, count, and serving size. Their prices are visible, but LookCloser does not claim savings until the pages share a UPC/GTIN.
Lowest New observed via Keepa on 2026-08-29.
View on Amazon ↗Useful official shopping lead; excluded from exact price comparisons.
Magnesium Glycinate 500mg, 240 Veggie Capsules · Default Title. The page matches 500 mg, but omits the identifier needed to bind the exact sellable unit.
Check brand website ↗No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search iHerb ↗No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search Target ↗No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
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The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Record built September 03, 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.