Full record · 737870230960 · back to the summary
Life Extension Potassium with Extend-Release Magnesium
Free to read, download and share — no signup, no paywall, no ads.
How to read this report
What this is. We compare what a listing claims against what public records show — label arithmetic, barcode registries, NIH’s label catalog, FDA enforcement data, certification registries, and published research. Every statement below traces to one of those.
What the states mean. Confirmed = an outside source agrees. Contradicted = an outside source disagrees. Caution = something needs explaining. No data = we looked and found nothing — a gap, not a strike.
What it is not. A clean record is not an endorsement and never proof a product works. A thin record is not an accusation. We publish evidence and gaps; the conclusion is yours. Nothing here is medical advice.
Something wrong? Every figure is meant to be checkable — sources are named and linked. Send a correction and we’ll fix the record.
The 99 mg potassium (as potassium chloride) claim matches the panel
We did the comparison: the listing claims 99 mg of potassium (as potassium chloride), and the listing-image panel shows 99 mg potassium (as potassium chloride) 1 vegetarian capsule. Those amounts agree. This is internal consistency, not independent lab testing.
| Panel row | Amount | %DV | What to notice |
|---|---|---|---|
| Magnesium (as ZümXR magnesium oxide, magnesium citrate) | 250 mg 60% | — | |
| Potassium (as potassium chloride) | 99 mg 2% | — |
FDA rules (21 CFR 101.36) require the amount of each dietary ingredient per serving unless hidden in a declared “proprietary blend” (legal, but a transparency yellow flag). A label stating no amount at all is non-compliant — a checkable red flag. This panel states amounts; any remaining comparison concerns the front-label framing.
vision:google/gemini-flash-1.5 Amounts are shown as declared panel data, not independently lab-tested contents.
Every check we ran
Exact trademark owner identified
USPTO lists Life Extension Foundation, Inc. (['CORPORATION', 'CORPORATION']) in ['FLORIDA, USA', 'FLORIDA, USA'] for the exact brand wordmark. This identifies the USPTO mark owner or applicant; it does not by itself prove who manufactures or sells this product.
Panel amounts are awaiting a clearer image read
The current image extraction retained 2 ingredient name(s) but no usable amounts. This is a LookCloser processing gap, not evidence that the brand withheld the numbers; dose arithmetic is withheld until the panel is re-read.
Research context is available for the listed ingredients
Published sources describe how magnesium have been studied. This is ingredient context only; the record does not establish that this product delivers the studied dose or outcome. Sources: NIH ODS — Magnesium fact sheet, PubMed search: magnesium glycinate supplementation.
Not found in NIH's DSLD label registry
The NIH Dietary Supplement Label Database has no matching label yet. Ingestion lags the market — recorded as a gap, not a strike.
Barcode record is too sparse to confirm identity
Open Food Facts resolves 737870230960 to "" (brand not supplied), but that record lacks enough exact brand/product detail to confirm or contradict this listing.
180-day review-count history is on file
Exact-listing history records written-review counts from 308 on 2026-01-23 to 332 on 2026-07-09 (net +24). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.
This item belongs to a catalog variation family
The paid catalog links this exact item to a parent listing. Review counts on public product pages may be shared across sizes, flavors, or other variants, so the count history is listing context — not evidence that reviewers received or tested this exact variant.
What the listing promises — claim by claim
Why is this shown?
| Claim | Status | What we found |
|---|---|---|
| Quality-testing claim “…ing only the finest raw ingredients with the purity and potency your body deserves. The majority of our prod…” | Claimed, not verifiable We looked for: a named laboratory, a certificate of analysis, or a certification-registry entry | No named laboratory, no certificate of analysis, and no certification-registry entry matching this product was located. |
| Origin claim “…of our products are non-GMO, gluten-free and manufactured in the USA—and a Certificate of Analysis is available f…” | Claimed, not verifiable We looked for: customs records or label filings showing where ingredients were sourced and where it was made | “Made in USA” can describe only final bottling. Ingredient-sourcing records were not located for this product. |
| Benefit claim “…– Heart Health Supplement for Blood Pressure Support with Two Essential Minerals – Non-GMO, Veget…” | Partly supported We looked for: whether the ingredient doses on the label match the doses used in published research | Published research exists for ingredients in this formula — see Related research below. Whether this product’s doses match those studies could not be confirmed. |
“No evidence located” does not mean a claim is false — it means the seller has not put evidence proportionate to the claim on the public record, and we could not find any. Absence of proof is not proof of absence.
This label vs. the doses studied
Why is this shown?
| Ingredient | Where this label sits | Reading |
|---|---|---|
| Magnesium (as ZümXR magnesium oxide, magnesi | shaded = doses used in studies (200 mg–420 mg) · bar = this label | 250 mg — within the studied range |
Matching a studied dose does not mean the product works, and missing it does not mean it fails — it shows whether the label and the research are talking about the same amounts. Not a recommendation to take any amount.
Documented cautions
- magnesium — daily oral use; chelated forms (glycinate) are studied for absorption — note labels may state compound mass rather than elemental magnesium, which differs ~7-fold
Statements from published sources about these ingredients — not advice about this product, and not a complete safety review. Anyone taking medication should talk to a pharmacist or clinician.
Verifiability profile — 2 of 6 public signals
What this listing gives the public to check. Publishing these signals doesn't prove quality — but withholding them means claims can only be taken on faith.
Identity
| UPC (barcode) — also our record ID | 737870230960 |
| Brand | Life Extension |
| Source listing identifier | B07P891S96 |
| Retailer listing title | Life Extension Potassium with Extend-Release Magnesium – Heart Health … show full titleLife Extension Potassium with Extend-Release Magnesium – Heart Health Supplement for Blood Pressure Support with Two Essential Minerals – Non-GMO, Vegetarian, Gluten-Free – 60 Capsules |
| USPTO brand owner | Life Extension Foundation, Inc. · ['CORPORATION', 'CORPORATION'] · ['FLORIDA, USA', 'FLORIDA, USA'] |
| Owner filed address | 3600 West Commercial Blvd., Ft. Lauderdale, FLORIDA 33309, UNITED STATES |
From the label (photo-read)
| Serving size | 1 Vegetarian Capsule |
| Pack statement | 60 vegetarian capsules |
| Badges printed on pack | NON GMO LE CERTIFIED, GLUTEN FREE |
Supplement Facts panel (photo-read):
| Ingredient | Amount per serving | Reading confidence |
|---|---|---|
| Magnesium (as ZümXR magnesium oxide, magnesium citrate) | 250 mg 60% | High clearly legible in the photo |
| Potassium (as potassium chloride) | 99 mg 2% | High clearly legible in the photo |
Claims printed on the packaging:
“IR Potassium with 6 Hour XR Magnesium” · “Promotes cardiovascular health” · “Supports healthy blood flow” · “Helps maintain blood vessel function” · “Take Heart in” · “1-2x daily” · “1-2-month supply” · “Promote optimal vascular function”
Read by a vision model from 8 listing photos — verbatim extraction; OCR errors possible. Spot a mistake? It will be corrected on review.
Ingredient science — NIH references
Magnesium — NIH ODS · MedlinePlus · PubMed (11,814) · UL 350 mg (SUPPLEMENTAL magnesium only (not from food))
Potassium — NIH ODS · MedlinePlus · PubMed (16,128) · no UL; supplements capped at 99 mg OTC
Reference data from the NIH Office of Dietary Supplements, IOM Dietary Reference Intakes, and PubMed. A Tolerable Upper Intake Level is a documented reference figure, not a safety verdict — both the declared amount and the reference are shown for your own judgment. LookCloser gives no medical advice.
Related research & consistency
magnesium — NIH ODS — Magnesium fact sheet · PubMed search: magnesium glycinate supplementation · WebMD: magnesium · ClinicalTrials.gov — 3,206 registered studies
ℹ Use pattern in research: daily oral use; chelated forms (glycinate) are studied for absorption — note labels may state compound mass rather than elemental magnesium, which differs ~7-fold.
These notes state where label numbers and marketing framing sit relative to published research — documentation for your own judgment, not medical advice. LookCloser does not advise for or against taking any supplement.
Record 737870230960 · built July 22, 2026 · lookcloser.ai · corrections@lookcloser.ai