Full record · lc-799e3f8b · back to the summary
Doctor's Best Glucosamine Chondroitin Msm with OptiMSM Capsules
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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.
What the label discloses
The listing-image panel publishes an amount for each of its 6 declared rows. That supports ingredient-by-ingredient review; it does not verify the contents.
| Panel row | Amount | %DV | What to notice |
|---|---|---|---|
| Chloride | 170 mg | — | |
| Sodium | 120 mg | — | |
| Potassium | 190 mg | — | |
| Glucosamine Hydrochloride Potassium Sulfate | 1500 mg | — | |
| Chondroitin Sulfate Sodium | 1200 mg | — | |
| MSM (methylsulfonylmethane)(OptiMSM®) | 1000 mg | — |
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; the open question is whether those declared amounts are independently verified and how they compare with relevant research.
vision:google/gemini-flash-1.5 Amounts are shown as declared panel data, not independently lab-tested contents.
Every check we ran
Multi-ingredient formula — panel read, serving weight unknown
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.
180-day review-count history is on file
Exact-listing history records written-review counts from 263 on 2026-01-22 to 245 on 2026-07-06 (net -18). 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 |
|---|---|---|
| Origin claim “…utrient in healthy joints.* TRUST AND PURE - Made in the USA with Globally-Sourced ingredients. Non-GMO,…” | 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 “…Chondroitin Msm with OptiMSM Capsules, Joint Support Supplement Supports Healthy Joint Structure,…” | Not assessed We looked for: whether the ingredient doses on the label match the doses used in published research | Ingredient-level evidence for this formula isn’t in our knowledge base yet. Recorded as not assessed — not as a negative. |
“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.
Verifiability profile — 1 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
| LookCloser record ID | lc-799e3f8b (internal — no barcode published, which limits cross-checking) |
| Brand | Doctor's BEST |
| Source listing identifier | B00KH6Q8X0 |
| Retailer listing title | Doctor's Best Glucosamine Chondroitin Msm with OptiMSM Capsules, Joint… show full titleDoctor's Best Glucosamine Chondroitin Msm with OptiMSM Capsules, Joint Support Supplement Supports Healthy Joint Structure, Function & Comfort, Non-GMO, Gluten Free, Soy Free, 360 Count |
From the label (photo-read)
| Serving size | 4 Capsules |
| Servings per container | 90 |
| Badges printed on pack | OptiMSM |
Supplement Facts panel (photo-read):
| Ingredient | Amount per serving | Reading confidence |
|---|---|---|
| Chloride | 170 mg | High clearly legible in the photo |
| Sodium | 120 mg | High clearly legible in the photo |
| Potassium | 190 mg | High clearly legible in the photo |
| Glucosamine Hydrochloride Potassium Sulfate | 1500 mg | High clearly legible in the photo |
| Chondroitin Sulfate Sodium | 1200 mg | High clearly legible in the photo |
| MSM (methylsulfonylmethane)(OptiMSM®) | 1000 mg | High clearly legible in the photo |
Claims printed on the packaging:
“Science-Based Nutrition™” · “Healthy Hair, Skin, Nails, & Joint Support*” · “OptiMSM” · “Dietary Supplement” · “Supports Joint Mobility*” · “Chondroitin Works To Enhance Joint Comfort*” · “MSM Supports Joint Health & Benefits Hair, Skin, and Nails*” · “GLUTEN-FREE”
Read by a vision model from 5 listing photos — verbatim extraction; OCR errors possible. Spot a mistake? It will be corrected on review.
Ingredient science
No knowledge-base entry yet for this formula's active ingredients — entries are added as the KB grows. Absence of a science card is a coverage gap, not a judgment.
Ingredient science — NIH references
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.
Record lc-799e3f8b · built July 22, 2026 · lookcloser.ai · corrections@lookcloser.ai