“Magnesium 420 mg per serving”
Evidence →The label promises 420 mg per serving. The panel says 1,502 mg. The matching NIH label filing needs an explanation.
Exact product checked · GTIN 00850053522796KAPPA NUTRITION · checked Jul 31, 2026 · on sale since Dec 18, 2024🇺🇸 USPTO wordmark owner · Mando International LLC · TEXAS, USA
Quick read · KAPPA NUTRITION
Magnesium L-Threonate Plant-Based 3 in 1 Powered by Magbrain®…
Checked against public sources on July 31, 2026 · LookCloser does not sell or recommend supplements.
60capsules · 30 servings
Does the marketing hold up?
Magnesium is above the adult upper limit. The panel lists 1502 mg magnesium. NIH gives 350 mg as the adult Tolerable Upper Intake Level for SUPPLEMENTAL magnesium only (not from food). That is about 4.3 times the limit.
Is the dose real?!Label says 420 mg · panel says 1,502 mg
What a serving costs$0.47per serving, at the checked price
Is it tested?Claimed — no lab or certificate found
Who’s behind it?🇺🇸Mando International LLClimited liability company · TEXAS, USA
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◖ partly confirmed1△ support not found1✗ contradicted2? couldn’t verifyno recalls
The label itself
What the Supplement Facts panel says
| Magnesium L-Threonate Advanced Complex | 1502 mg |
|---|
Printed on the package: Non-GMO · Vegan · Gluten-Free · Independent Lab Tested · SAME TRUSTED NON-GMO FORMULA · QUALITY YOU CAN TRUST · THIRD-PARTY LAB TESTED · cGMP CERTIFIED FACILITY
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.
Marketing claims, checked
The checks, one by one
2 promises need a closer look.
✕Contradicted by the saved record1
◐Partly confirmed1
“BY MAGBRAIN MAGNESIUM L-THREONATE PLANT-BASED Magnesium L-Threonate Plant-Based 3 in 1 combines Magbrain Magnesium L-Threonate Plant-Based,…”
Evidence →Ingredient evidence exists; on dose: label states 420 mg/serving — about 100% 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.
△Claimed without support found1
“STUDIED”
Evidence →We found no named, citable study of this product or formula. The claim may rest on ingredient research rather than a trial of this product.
?Couldn’t verify independently2
“CANADIAN MAGNESIUM MANUFACTURED IN THE USA We source our premium magnesium from Canada's pristine mineral regions, then manufacture every bottle…”
Evidence →“Made in USA” can describe only final bottling. Ingredient-sourcing records were not located for this product.
“Lab”
Evidence →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.
Marketing language, not scored
HIGH POTENCY • ADVANCED COMPLEX · Same Magbrain® Formula. Same Powerful Results · HIGH POTENCY • ADVANCED ABSORPTION
Quick read · 5 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
Needs explanationIs the label honest?
Magnesium: 1502 mg on the label; adult upper limit 350 mg.
This serving is about 4.3× the adult upper limit shown by NIH. The limit applies to SUPPLEMENTAL magnesium only (not from food).
Evidence and sources
The panel lists 1502 mg magnesium. NIH gives 350 mg as the adult Tolerable Upper Intake Level for SUPPLEMENTAL magnesium only (not from food). That is about 4.3 times the limit.
NIH ODS — Magnesium fact sheetupper-limit and Daily Value contextNIH ODS — Magnesium fact sheetmagnesium context · not product evidencePubMed search: magnesium glycinate supplementationmagnesium context · not product evidence
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?
Registered in NIH's supplement label database (DSLD)
A government label filing makes the listed formula easier to inspect and compare over time.
Evidence and sources
Label #288533 “Magnesium 3 in 1 L-Threonate Advanced Complex” (KAPPA NUTRITION), entered 2023-08-23, with the full Supplement Facts on file. Company on file: Manufacturer — Kappa Nutrition, Frisco, Tx.
Locked evidence record →Open the full source-linked findingPublic contextWill you get what you pay for?
Reaching a studied dose costs about $14/month
Comparing cost at a research-relevant amount shows how quickly the package is used and what the routine actually costs.
Evidence and sources
At 1.0 serving(s) a day to reach the low end of the studied range (200–420 mg), this product runs roughly $14 per month. A price observation, not a recommendation.
Locked evidence record →Open the full source-linked findingCheckedCan you trust the review pattern?
Reviews rose from 2 to 81 between August 11, 2025 and July 21, 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 2 to 81 between August 11, 2025 and July 21, 2026. The largest rise inside any single 30-day window was about 15, 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.
- Barcode checksum is valid; no independent product record was found.
These are evidence gaps, not strikes against the product.
Who owns the brand wordmark?
🇺🇸
Mando International LLCLimited Liability Company · exact supplement-class mark for KAPPA NUTRITION
Filed address
6845 Solitude Creek Ct, Frisco, TEXAS 75036, 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 ↗
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 RANGE01652.2 mg
1502 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 1.502 g 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$13.99
$0.47 per labeled serving
matching UPC/GTIN · checked Aug 1, 2026
View on Amazon ↗iHerb
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 iHerb ↗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 ↗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.
Want to inspect the evidence?
The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Record built August 02, 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.