“Magnesium 160 mg per serving”
Evidence →The label promises 160 mg per serving. The panel says 160 mg. They match.
Exact product checked · barcode not publishedSports Research · checked Jul 25, 2026 · on sale since Feb 28, 2025🇺🇸 USPTO wordmark owner · Sports Research Corporation · CALIFORNIA, USA
Quick read · Sports Research
Sports Research® Magnesium Glycinate 160mg
Checked against public sources on July 25, 2026 · LookCloser does not sell or recommend supplements.
180capsules · 90 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?✓Listing and panel agreeboth say 160 mg of Magnesium
What a serving costsNo price found for this exact barcode
Is it tested?No testing claim made
Who’s behind it?🇺🇸Sports Research Corporationcorporation · CALIFORNIA, USA
Is it the real thing?No barcode publishedso it can’t be matched against certification, recall or other retailer 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✓ checked out1◖ partly confirmedno contradictions · no recalls
The label itself
What the Supplement Facts panel says
| Magnesium | 160 mg |
|---|
Printed on the package: VEGAN · GLUTEN-FREE · NON-GMO · Dietary Supplement · NON GMO Project 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
1 promise checks out. 1 could not be fully confirmed from public sources.
✓Matches the label1
◐Partly confirmed1
“RESTFUL SLEEP: Sports Research Magnesium Glycinate promotes restful sleep by stimulating gamma-aminobutyric acid (GABA)—an essential…”
Evidence →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.
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 findingCheckedCan you trust the review pattern?
Reviews rose from 33 to 92 between August 22, 2025 and August 25, 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 33 to 92 between August 22, 2025 and August 25, 2026. The largest rise inside any single 30-day window was about 10, so the count moved in steps rather than in one burst.
Locked evidence record →Open the full source-linked findingWho 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
160 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 160 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.
Buying options
Where you can check or buy it
Open related seller leads before buying, then confirm the flavor, count, and serving size. Their prices are visible, but LookCloser does not claim savings until the pages share a UPC/GTIN.
Amazon
Submitted listing$29.95
Lowest New observed via Keepa on 2026-08-29.
View on Amazon ↗Brand website
Official product-page candidate · UPC absent$29.95In stock
Useful official shopping lead; excluded from exact price comparisons.
Magnesium Glycinate Veggie Capsule · 160 MG / 180 Veggie Capsules. The page matches 160 mg, but omits the identifier needed to bind the exact sellable unit.
Check brand website ↗iHerb
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search iHerb ↗Target
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search Target ↗Walmart
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search Walmart ↗Prices and stock are point-in-time observations. Related pages are never used as product evidence. No affiliate links; LookCloser earns nothing from these sellers.
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.