“Vitamin C 25 mg per serving”
Evidence →The label promises 25 mg per serving. The panel says 25 mg. They match.
Exact product checked · GTIN 00850011900130DEAL SUPPLEMENT · checked Aug 6, 2026 · on sale since Sep 13, 2019Package says manufactured for: Arena Nutrition, Inc. · 1249 S Diamond Bar Blvd, Diamond Bar, CA 91765
Quick read · DEAL SUPPLEMENT
Magnesium Glycinate 500mg Per Capsule (1,000 mg Per Serving) Plus…
Checked against public sources on August 6, 2026 · LookCloser does not sell or recommend supplements.
240capsules · 120 servings
Does the marketing hold up?
Testing claimed — documentation not found. The observed listing and a related brand product page both claim third-party testing. Neither names the laboratory or links a product- or lot-specific report. …
Is the dose real?✓Listing and panel agreeboth say 180 mg of Magnesium
What a serving costs$0.15per serving, at the checked price
Is it tested?Claimed — no lab or certificate found
Who’s behind it?No exact match in USPTO
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 confirmed1? couldn’t verifyno contradictions · no recalls
The label itself
What the Supplement Facts panel says
| Vitamin C (as Ascorbic Acid) | 25 mg |
|---|---|
| Magnesium (as Magnesium Glycinate) | 180 mg |
| Magnesium Glycinate | 1,000 mg |
Printed on the package: GMO FREE · SOY FREE · GLUTEN FREE · LAB TESTED · 3rd Party Lab Tested
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.
Marketing claims, checked
The checks, one by one
1 promise checks out. 2 could not be fully confirmed from public sources.
✓Matches the label1
◐Partly confirmed1
“Glycinate Capsules with Vitamin C – Highest bioavailable chelated magnesium glycinate 1,000mg per serving, enhanced with vitamin C to support…”
Evidence →Ingredient evidence exists; on dose: label states 180 mg/serving — about 43% 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.
?Couldn’t verify independently1
“TESTED”
Evidence →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.
We looked and found no public proof. That does not count against the product.
Quick read · 2 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
CheckedIs the label honest?
Every ingredient shows its amount · 3 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 · 850011900130.
The barcode matches, so we are checking the right product rather than a look-alike.
Evidence and sources
UPCitemdb resolves 850011900130 to "Magnesium Glycinate 500mg Per Capsule (1000mg Per Serving) Plus Vitamin C 240 C" (Eagleshine) — consistent with this listing.
Locked evidence record →Open the full source-linked findingWhat remains open 3
- No FDA recall matched this brand in the current search.
- We have not found a public label filing for this exact product.
- Brand ownership is not settled in this record.
These are evidence gaps, not strikes against the product.
Research behind the findings
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.
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 180 mg of magnesium per serving. Studies we found used 200 mg–420 mg a day, so this sits below 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$17.59
$0.15 per labeled serving
matching UPC/GTIN · checked Aug 6, 2026
View on Amazon ↗Brand website
Official product-page candidate · UPC absent$22.95
Official shopping lead; excluded from exact price comparisons.
Magnesium Glycinate 1,000mg Plus Vitamin C, 240 Capsules · Default Title. Confirm the package UPC/GTIN before buying.
Check brand website ↗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.
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.
The observed listing and related brand page repeat 1,000 mg, 240 capsules, 2 capsules, 25 mg. That confirms cross-page consistency of the published claim, not the product contents.
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 06, 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.