full reportFull record · 810047391630 · back to the summary
Free to read, download and share — no signup, no paywall, no ads.
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 listing-image panel publishes an amount for each of its 1 listed row. That supports ingredient-by-ingredient review; it does not verify the contents.
| Panel row | Amount | %DV | What to notice |
|---|---|---|---|
| Magnesium [as Magnesium Glycinate Complex (magnesium glycinate, magnesium oxide)] | 420 mg | — |
FDA rules (21 CFR 101.36) require the amount of each dietary ingredient per serving unless hidden in a listed “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; the open question is whether those listed amounts are independently verified and how they compare with relevant research.
vision:claude-cli:subscription Amounts are shown as listed panel data, not independently lab-tested contents.
Every check we ran
Confirmed evidence
These checks found support in the public record. They confirm specific facts, not the product as a whole.
Label #322430 “Advanced Magnesium Glycinate Complex” (Doctors' Preferred), entered 2025-02-23, with the full Supplement Facts on file. Company on file: Distributor — Healthy Directions, Bethesda, MD.
The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.
USPTO lists Doctors' Preferred, Inc. (CORPORATION; LIMITED LIABILITY COMPANY) in MARYLAND, USA; DELAWARE, 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.
Written reviews rose from 38 to 45 between September 17, 2025 and June 14, 2026. The largest rise inside any single 30-day window was about 3, so the count moved in steps rather than in one burst.
Documented concerns
These are documented contradictions or claims that need more evidence. They are separate from missing data.
Every amount on this panel is a blend total: Magnesium [as Magnesium Glycinate Complex (magnesium glycinate, magnesium oxide)]. A blend total tells you the combined weight of several ingredients, not how much of any one of them you are getting — the amounts could be split in any proportion. Manufacturers are allowed to label this way. It means the individual doses are not public, so nobody outside the company can check them.
The panel lists 420 mg magnesium. NIH gives 350 mg as the adult Tolerable Upper Intake Level for SUPPLEMENTAL magnesium only (not from food). That is about 1.2 times the limit.
Unresolved public record
We looked for these signals but could not settle them from public sources. A gap is not a strike.
We read the full Supplement Facts panel from the listing-image panel (below), but the label doesn’t state a serving weight, so the arithmetic can’t run. A gap in the label’s information, not evidence of a problem.
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.
This means only that no enforcement record matched the brand name — it does not mean the product was tested, reviewed, or cleared by FDA. New and untested products also have no recall records.
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.
Exact-listing history records written-review counts from 37 on 2025-08-02 to 45 on 2026-06-14 (net +8). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.
Check digit passes; no third-party database record found yet. Coverage gaps are common — not a strike.
What to ask and check
Ask the brand or seller
Which specific study supports this claim — and was it run on this exact formula?
Ask for the citation, how many people took part, the dose used, and whether the study tested this product or just one ingredient in it. Ingredient research is not product evidence.
Were the endorsing professionals compensated, and what exactly did they review?
An endorsement can be genuine and still not mean the product was tested. Ask whether they reviewed the formula, the manufacturing, or only the marketing.
Most brands and sellers publish a contact route. A clear answer adds evidence to the record; no answer leaves the question open.
Check for yourself — no one’s permission needed
Compare the panel on the bottle in your hand to the one shown in this record.
Ours was read from listing photos and can contain reading errors. The physical label is the source of truth — if they disagree, tell us and we’ll correct the record.
Scan the barcode on the package and confirm it reads 810047391630.
A mismatch between the barcode on the box and the one on the listing is worth pausing over — it can indicate a different variant, a repack, or a counterfeit.
Check the lot number and expiry on the bottle against any COA you’re given.
A certificate that doesn’t name your lot doesn’t describe what you’re holding.
These are the open questions on this specific record — not a warning about the product, and not a suggestion to buy or avoid it. Getting them answered is how you decide for yourself.
What the listing promises — claim by claim
| Claim | Status | What we found |
|---|---|---|
| Clinical-evidence claim “…THE DOCTORS’ PREFERRED DIFFERENCE: Helping people live healthier, more active lives for over 30 years through innovative and exclusive doctor-developed formulas, superio” | No evidence located We looked for: a named, citable clinical study of this product or formula | We found no named, citable study of this product or formula. The claim may rest on ingredient research rather than a trial of this product. |
| Professional-endorsement claim “…THE DOCTORS’ PREFERRED DIFFERENCE: Helping people live healthier, more active lives for over 30 years through innovative and exclusive doctor-developed formulas, superio” | Marketing credential We looked for: who the professionals are, whether they were compensated, and what the endorsement covers | A professional endorsement is a marketing credential, not clinical evidence. Public sources don’t establish who was consulted, whether they were paid, or what specifically they reviewed. |
| Manufacturing claim “…GMP…” | Partly supported We looked for: the facility registration or certificate behind the claim | “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. |
| Benefit claim “…SUPPORTS YOUR HEART AND ENTIRE CARDIOVASCULAR SYSTEM, AND METABOLIC FUNCTION.…” | 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. 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
| Ingredient | Where this label sits | Reading |
|---|---|---|
| Magnesium [as Magnesium Glycinate Complex (m | shaded = doses used in studies (200 mg–420 mg) · bar = this label | 420 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
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 — 4 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 | 810047391630 — via source listing UPC |
| Brand | DOCTORS' PREFERRED |
| Source listing identifier | B0CSQQ2PHC |
| USPTO brand owner | Doctors' Preferred, Inc. · CORPORATION; LIMITED LIABILITY COMPANY · MARYLAND, USA; DELAWARE, USA |
| Owner filed address | 7811 Montrose Road, Potomac, MARYLAND 208541871, UNITED STATES |
From the label (photo-read)
| Serving size | 2 Vegan Capsules |
| Servings per container | 30 |
| Pack statement | 60 Capsules / 30 Servings |
| Badges printed on pack | Gluten Free, DOCTOR FORMULATED TRUSTED SOLUTIONS, GMP, DOCTOR DEVELOPED, PATIENT VERIFIED, REMARKABLE RESULTS |
Supplement Facts panel (photo-read):
| Ingredient | Amount per serving | Reading confidence |
|---|---|---|
| Magnesium [as Magnesium Glycinate Complex (magnesium glycina | 420 mg | High clearly legible in the photo |
Claims printed on the packaging:
“HIGH POTENCY” · “420 mg / serving” · “420 mg / 100% Daily Value Per 2-Capsule Serving” · “Dietary Supplement” · “Doctor's Suggested Use: Take 2 vegan capsules daily with a meal.” · “Keep out of reach of children.” · “FUEL YOUR MIND AND BODY WITH DOCTOR-DEVELOPED SUPPORT” · “Promotes heart health”
Read by a vision model from 8 listing photos — verbatim extraction; OCR errors possible. Spot a mistake? It will be corrected on review.
Supplement Facts — NIH DSLD registry
serving: 2 Tablet(s) · contents: 60 Tablet(s) · label #322430 at dsld.od.nih.gov
| Ingredient | Amount per serving |
|---|---|
| Magnesium | 420 mg |
mcg = 1/1,000 of a mg. As filed in the NIH Dietary Supplement Label Database — the authoritative digitization of the printed label. Label versions can lag reformulations.
Where it sells
| Seller | Price |
|---|---|
| Retailer listing ↗ | $19.99 checked Aug 02, 2026 — varies by variant/session; price history pending |
Official brand domain: www.doctorspreferred.com. This storefront does not expose a complete public catalog count.
Reference links for identification only — LookCloser has no affiliate relationships and earns nothing from any link on this page.
Ingredient science — NIH references
Magnesium — NIH ODS · MedlinePlus · PubMed (11,814) · UL 350 mg (SUPPLEMENTAL magnesium only (not from food))
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 listed 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 810047391630 · built August 02, 2026 · lookcloser.ai · corrections@lookcloser.ai