Exact product checked · GTIN 00023249092193Sports Research · checked Jul 25, 2026 · on sale since May 10, 2024🇺🇸 USPTO wordmark owner · Sports Research Corporation · CALIFORNIA, USA
Quick read · Sports Research
Sports Research® Magnesium Glycinate 160mg
Checked against public sources between July 25 and July 28, 2026 · LookCloser does not sell or recommend supplements.
90capsules · 45 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?Panel read — dose not verified2 ingredients listed; no advertised amount we could confirm against them
What a serving costs$0.40per 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?Recall check not run yeta gap in our records, not a finding about the product
“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 confirmedno contradictions · no recalls
The label itself
What the Supplement Facts panel says
Serving size 2 Veggie Capsules · 45 servings per container
Magnesium
160 mg
magnesium glycinate
1441 mg
Printed on the package:Non-GMO · Vegan · Gluten-Free · NON GMO Project VERIFIED · CERTIFIED VEGAN · VEGAN.ORG · Chelated · Dietary Supplement
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
The public sources did not settle the marketing promises on this label.
◐Partly confirmed1
“RESTFUL SLEEP: Sports Research Magnesium Glycinate promotes restful sleep by stimulating gamma-aminobutyric acid (GABA)—an essential…”
Ingredient evidence exists; on dose: label states 160 mg/serving — about 38% 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 · 3 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 160 mg; the photo-read Supplement Facts panel shows Magnesium at 160 mg per serving — the listing text and its photo-read panel agree; this is internal consistency, not independent testing.
Comparing cost at a research-relevant amount shows how quickly the package is used and what the routine actually costs.
Evidence and sources
At 1.2 serving(s) a day to reach the low end of the studied range (200–420 mg), this product runs roughly $15 per month. A price observation, not a recommendation.
Reviews rose from 59 to 297 between August 5, 2025 and August 18, 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 59 to 297 between August 5, 2025 and August 18, 2026. The largest rise inside any single 30-day window was about 31, so the count moved in steps rather than in one burst.
We have not found a public label filing for this exact product.
Barcode checksum is valid; no independent product record was found.
These are evidence gaps, not strikes against the product.
Who owns the brand wordmark?
🇺🇸
Sports Research CorporationCorporation · exact supplement-class mark for SPORTS RESEARCH
Registration5516811
Registered2018-07-17
AssignmentsNo transfers recorded
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
160 mg per serving — below the 200–420 mg/day used in the linked studies.
Linked ingredient research · label amount, not a recommendation
Same UPC/GTIN observed across 2 sellers. Amazon was lowest at $17.95; iHerb was highest at $18.97 — a $1.02 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.
The observed listing and related brand page repeat 160 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 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 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.
