“Magnesium 300 mg per serving”
Evidence →The label promises 300 mg per serving. The panel says 300 mg. They match.
Exact product checked · GTIN 00051494103968MegaFood · checked Jul 30, 2026 · on sale since Dec 16, 2019
Quick read · MegaFood
MegaFood Magnesium Glycinate
Checked against public sources on July 30, 2026 · LookCloser does not sell or recommend supplements.
60capsules · 30 servings
Does the marketing hold up?
Testing claimed — documentation not found. The observed listing claims third-party testing without naming a lab or certifier. No product-bound report is saved, so the claim cannot be verified as stated. …
Is the dose real?✓Listing and panel agreeboth say 300 mg of Magnesium
What a serving costs$0.53per 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 out2◖ partly confirmed1? couldn’t verifyno contradictions · no recalls
The label itself
What the Supplement Facts panel says
| Magnesium (as magnesium malate, magnesium citrate, magnesium glycinate) | 300 mg |
|---|---|
| Organic spinach leaf | 50 mg |
Printed on the package: VEGETARIAN · GLUTEN FREE · NO MILK · NO EGG · NO PEANUTS · NO TREE NUTS · NO WHEAT
We read 2 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. 3 could not be fully confirmed from public sources.
✓Matches the label1
◐Partly confirmed2
“ABSORBABLE BLEND: Help relax the body with this chelated Magnesium supplement, formulated with three highly absorbable(1) forms of Magnesium;…”
Evidence →Ingredient evidence exists; on dose: label states 300 mg/serving — about 71% 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.
“TO QUALITY: Vegetarian, gluten-free, third-party tested for 150+ chemical substances, GMP quality assured, and made without the top nine food…”
Evidence →“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.
Ingredient research can support context, but it is not a trial of this exact product.
?Couldn’t verify independently1
“TO QUALITY: Vegetarian, gluten-free, third-party tested for 150+ chemical substances, GMP quality assured, and made without the top nine food…”
Evidence →No named laboratory or lot-specific certificate was found for this exact product. A related brand page names no testing issuer and links no product-bound report; 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 · 4 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
CheckedIs 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 300 mg; the photo-read Supplement Facts panel shows Magnesium (as magnesium malate, magnesium citrate, magnesium glycinate) at 300 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 · 2 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 · 051494103968.
The barcode matches, so we are checking the right product rather than a look-alike.
Evidence and sources
Open Food Facts resolves 051494103968 to "Magnesium" (MegaFood) — consistent with this listing.
Locked evidence record →Open the full source-linked findingPublic contextWill you get what you pay for?
Reaching a studied dose costs about $16/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 $16 per month. A price observation, not a recommendation.
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.
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 RANGE0525 mg
300 mg per serving — within 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 300 mg of magnesium per serving. Studies we found used 200 mg–420 mg a day, so this sits inside 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$15.97
$0.53 per labeled serving
matching UPC/GTIN · checked Jul 31, 2026
View on Amazon ↗Brand website
Official product-page candidate · UPC absent$17.99
Official shopping lead; excluded from exact price comparisons.
Extra Strength Magnesium Glycinate Capsules · 30 Day | 120ct. 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.
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.