“Magnesium 2,000 mg per serving”
Evidence →The label promises 2,000 mg per serving. The panel says 144 mg. Because this panel was read from an image, confirm the physical label before treating the difference as settled.
Exact product checked · GTIN 00023249091516Sports Research · checked Aug 4, 2026 · on sale since Jan 1, 2022🇺🇸 USPTO wordmark owner · Sports Research Corporation · CALIFORNIA, USA
Quick read · Sports Research
Sports Research® Magnesium L-Threonate 2,000 mg…
Checked against public sources on August 4, 2026 · LookCloser does not sell or recommend supplements.
90capsules · 30 servings
Does the marketing hold up?
Listing claim matches the Supplement Facts panel. The label promise and the Supplement Facts amount agree.
Is the dose real?!Label says 2,000 mg · panel says 144 mg
What a serving costs$1.00per serving, at the checked price
Is it tested?No testing claim made
Who’s behind it?🇺🇸Sports Research Corporationcorporation · CALIFORNIA, 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.
2◖ partly confirmed1? couldn’t verifyno contradictions · no recalls
The label itself
What the Supplement Facts panel says
| Magnesium (from 2000 mg magnesium L-threonate) (Magtein®) | 144 mg |
|---|
Printed on the package: VEGAN · GLUTEN-FREE · NON-GMO · Non-GMO Project Verified · Non-GMO Verified
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
The public sources did not settle the marketing promises on this label.
◐Partly confirmed2
“absorbed, our magnesium L threonate capsules are used for their overall brain health benefits and may help support memory, focus, relaxation,…”
Evidence →Ingredient evidence exists; on dose: label states 2000 mg/serving — about 476% 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
“IN THE USA: Our products are made in cGMP compliant facilities in the United States, using only the best ingredients from domestic & international”
Evidence →“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.
Marketing language, not scored
Advanced Formula
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 2 g; the photo-read Supplement Facts panel shows Magnesium (from 2000 mg magnesium L-threonate) (Magtein®) at 2 g 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 · 023249091516.
The barcode matches, so we are checking the right product rather than a look-alike.
Evidence and sources
UPCitemdb resolves 023249091516 to "Sports Research Sports Research Magnesium L-Threonate - 90 Count" (Sports Research) — 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 $30/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 $30 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.
Who owns the brand wordmark?
🇺🇸
Sports Research CorporationCorporation · exact supplement-class mark for SPORTS RESEARCH
Filed address
784 W. Channel St., San Pedro, California 90731, 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 RANGE0525 mg
144 mg per serving — below 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 144 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$29.95
$1.00 per labeled serving
matching UPC/GTIN · checked Aug 4, 2026
View on Amazon ↗Brand website
Official product-page candidate · UPC absent$29.95
Official shopping lead; excluded from exact price comparisons.
Magnesium L-Threonate · 2000 MG / 90 Veggie Capsules. 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 the complete evidence trail?
The summary stops at product-specific facts. The full report preserves every source, calculation, limitation, and unresolved check for review or sharing.
Record built August 04, 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.