“Magnesium 500 mg per serving”
Evidence →The label promises 500 mg per serving. The panel says 500 mg. They match.
Exact product checked · GTIN 00074312530869Nature's Bounty · checked Jul 20, 2026 · on sale since Jan 10, 2014USPTO returned 3 exact supplement-class owner records · inspect the identity trail
Quick read · Nature's Bounty
Nature's Bounty Magnesium 500 mg Tablets
Checked against public sources between July 20 and July 24, 2026 · LookCloser does not sell or recommend supplements.
200tablets
Does the marketing hold up?
Registered owner records: NATURE'S BOUNTY, INC. · NATURE'S BOUNTY (NY), INC. · Société des Produits Nestlé S.A. (société anonyme (sa); SWITZERLAND). The public ownership record is ambiguous. We show the exact candidates instead of choosing one by name similarity.
Is the dose real?✓Listing and panel agreeboth say 500 mg of Magnesium
What a serving costsNo price found for this exact barcode
Is it tested?No testing claim made
Who’s behind it?USPTO lists 3 owner recordssame brand name, more than one registrant — we don’t choose between them
Is it the real thing?✓Barcode matches outside records
Trouble on record?✓No recalls found
“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.
1✓ checked out1◖ partly confirmedno contradictions · no recalls
The label itself
What the Supplement Facts panel says
| Magnesium | 500 mg |
|---|
Printed on the package: Non-GMO · Suitable for Vegetarians · No Artificial Flavor · No Artificial Sweetener · No Sugar · No Starch · No Milk · No Lactose
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.
Marketing claims, checked
The checks, one by one
1 promise checks out. 1 could not be fully confirmed from public sources.
✓Matches the label1
◐Partly confirmed1
“Nature's Bounty Magnesium 500 mg Tablets, High Potency Magnesium Supplement for Bone & Muscle Health, Whole Body Support, 200 Count (Pack of”
Evidence →Ingredient evidence exists; on dose: label states 500 mg/serving — about 119% of the adult daily reference (adult RDA 310–420 mg elemental; NIH sets 350 mg/day as the supplemental upper level for elemental magnesium). A single serving isn’t meant to supply a full day, so this is context, not a shortfall. Caveat: chelate labels (glycinate, citrate) often state compound mass, which reads ~5–7× higher than elemental magnesium — the Supplement Facts panel settles which is meant.
Ingredient research can support context, but it is not a trial of this exact product.
Quick read · 4 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
Public contextWho is behind it?
Registered owner records: NATURE'S BOUNTY, INC. · NATURE'S BOUNTY (NY), INC. · Société des Produits Nestlé S.A. (société anonyme (sa); SWITZERLAND)
The public ownership record is ambiguous. We show the exact candidates instead of choosing one by name similarity.
Evidence and sources
USPTO returned multiple live supplement-class records for the exact brand wordmark: NATURE'S BOUNTY, INC., NATURE'S BOUNTY (NY), INC., Société des Produits Nestlé S.A. (société anonyme (sa); SWITZERLAND). …
Locked evidence record →Open the full source-linked findingCheckedIs the label honest?
Listing claim matches the Supplement Facts panel
The label promise and the Supplement Facts amount agree.
Evidence and sources
The listing claims 500 mg; the photo-read Supplement Facts panel shows Magnesium at 500 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 findingCheckedIs the label honest?
Every 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 findingCheckedWho is behind it?
The barcode identity checks out · 074312530869.
The barcode matches, so we are checking the right product rather than a look-alike.
Evidence and sources
Open Food Facts resolves 074312530869 to "Magnesium, Tablets" (Nature's Bounty) — consistent with this listing.
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.
Who owns the brand wordmark?
The brand has 3 exact supplement-class records
These are the USPTO records behind the brand name. We show them all rather than choosing one by similarity.
🇺🇸NATURE'S BOUNTY, INC.
NEW YORK, USA; SWITZERLAND · Registration 0963384
55 NORTH MALL, PLAINVIEW, NEW YORK 11803, UNITED STATES
Goods covered by this record
US 018: FOOD SUPPLEMENT CONTAINING VITAMINS AND MINERALS.; US 046: CONCENTRATED PROTEIN FOOD.
🇺🇸NATURE'S BOUNTY (NY), INC.
NEW YORK, USA; SWITZERLAND · Registration 5165421
2100 SMITHTOWN AVENUE, LEGAL DEPT., RONKONKOMA, NEW YORK 11779, UNITED STATES
Goods covered by this record
IC 005: Dietary and nutritional supplements; Food supplements; Herbal supplements; Probiotic supplements; Vitamin and mineral supplements.
🇨🇭Société des Produits Nestlé S.A. (société anonyme (sa); SWITZERLAND)
SWITZERLAND · Registration 7583162
SWITZERLAND); CH-1800 Vevey, SWITZERLAND
Goods covered by this record
IC 005: Vitamins; dietary supplements; mineral supplements; nutritional supplements; vitamin preparations; concentrated protein dietary supplements; plant-based dietary supplements; dietetic supplements adapted for medical use; food supplements; probiotic supplements.
This answers who owns registrations for the brand wordmark. It does not by itself prove which entity made, imported, or sold this specific product. Open USPTO source ↗
Research behind the findings
Dose and research context
The label amount is shown beside the range used in the linked ingredient studies.
Dose vs research
Magnesium
STUDIED RANGE0550 mg
500 mg per serving — above the 200–420 mg/day used in the linked studies.
Linked ingredient research · label amount, not a recommendation
Background reading
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 500 mg of magnesium per serving. Studies we found used 200 mg–420 mg a day, so this sits above that range.
0studied 200 mg–420 mg
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
Where it sells
Price check for this exact product
Amazon
Exact UPC/GTIN match$7.47
matching UPC/GTIN · checked Sep 1, 2026
View on Amazon ↗iHerb
Exact UPC/GTIN match$12.98
matching UPC/GTIN · checked Jul 24, 2026
View on iHerb ↗Brand website
Official product-page candidate · UPC absent$0.00
Official shopping lead; excluded from exact price comparisons.
Magnesium - 200 Tablets · Default Title. Confirm the package UPC/GTIN before buying.
Check brand website ↗Target
Not confirmedNo exact listing saved
We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Target ↗Walmart
Not confirmedNo exact listing saved
We 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 2 sellers. Amazon was lowest at $7.47; iHerb was highest at $12.98 — a $5.51 range at check time.
The brand-page price is shown as a shopping lead only. It is excluded from the exact-product price difference because the page does not publish this record's matching UPC/GTIN.
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 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.