Every ingredient amount is disclosed
The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.
Full record · lc-a98f4307 · back to the summary
THORNE - FiberMend - Prebiotic Fiber Powder to Help Maintain Regularity and Balanced GI …
Exact product checkedGTIN not published · checked 2026-07-23
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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.
Panel, decoded
What the label discloses
10listed rows
10separately quantified
0combined blend totals
The listing-image panel publishes an amount for each of its 10 listed rows. That supports ingredient-by-ingredient review; it does not verify the contents.
| Panel row | Amount | %DV | What to notice |
|---|---|---|---|
| Calories | 45 | — | |
| Total Fat | 1 g | — | |
| Total Carbohydrate | 9 g | — | |
| Dietary Fiber | 7 g | — | |
| Soluble Fiber | 6 g | — | |
| Partially Hydrolyzed Guar Gum | 8 g | — | |
| Rice Bran | 2.5 g | — | |
| Arabinogalactan (from Larch) (Larix spp.) | 300 mg | — | |
| Pectin (from Apple) | 150 mg | — | |
| Green Tea Phytosome (Camellia sinensis extract (leaf) decaffeinated / Phospholipid complex from Sunflower) | 50 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:google/gemini-2.5-flash Amounts are shown as listed panel data, not independently lab-tested contents.
Every check we ran
Confirmed evidence
What checked out2
These checks found support in the public record. They confirm specific facts, not the product as a whole.
Confirmed
Exact trademark owner identified
USPTO lists Thorne Research, Inc. (CORPORATION) in IDAHO, USA; SOUTH CAROLINA, 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.
Documented concerns
What needs caution0
These are documented contradictions or claims that need more evidence. They are separate from missing data.
No contradictions or product-specific cautions were found at this check depth.
Unresolved public record
What is still missing6
We looked for these signals but could not settle them from public sources. A gap is not a strike.
Panel arithmetic needs confirmation
The listing-image panel produced 17,000 mg across 6 actives for an ≈11,000 mg serving. That cannot be reconciled; the physical label or another exact filed document must settle it.
Review-count history: not available
Marketplace rating not shown★ — rating count unavailable. No exact-listing count history was available, so no review-pattern claim is made.
“Lab tested” claimed, but no lab or report named
The observed listing claims third-party testing without naming a lab or certifier. No product-bound report is saved, so the claim cannot be verified as stated. Under NSF/ANSI 173, NSF lists Thorne® products, including Thorne® L-Glutamine Powder, but the saved registry result does not cover this exact SKU. IFOS, USP, and Informed-Sport were not checked in this record.
Photo-read pack math is internally consistent
30 servings × 11 g = 330 g, matching the printed net weight 330 g (NET WT 11.6 OZ (330 G)). This checks agreement within the photo read; it is not an independent contents test.
Research context is available for the listed ingredients
Published sources describe how prebiotic fiber 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 — Fiber overview (MVMS context), PubMed search: inulin prebiotic randomized trial.
Certified by NSF — contents and contaminants checked
Thorne® appears in NSF’s certified-products registry with 10 certified product(s), but we couldn’t confirm this exact listing is among them. Closest listed product: “Thorne® L-Glutamine Powder”. Certification covers contents and contaminants — not effectiveness.
What to ask and check
What would settle the open questions
Why is this shown?
Everything we couldn’t verify is something a person can still ask about. Rather than leave gaps sitting as dead ends, we turn each one into a specific question — the exact document, citation, or number that would settle it — plus the things you can confirm yourself with the bottle in your hand.
Ask the brand or seller
1
Can you send the certificate of analysis (COA) for the lot number on my bottle?
A real COA names the testing laboratory, the test date, the lot it covers, and what was measured. “Third-party tested” with no document behind it is a marketing sentence.
2
What is the product’s UPC or GTIN?
The barcode is how a product gets matched to outside records — certification registries, label databases, recall data. Without it, almost nothing can be cross-checked.
3
Is this label filed with NIH’s Dietary Supplement Label Database (DSLD)?
Filing is voluntary, so absence proves nothing — but a filed label puts the full ingredient table on public record where anyone can read it.
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
1
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.
2
Look the product up yourself in NSF’s certified-products registry.
Search “Thorne®” at info.nsf.org — certification covers contents and contaminants, not effectiveness.
3
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
Why is this shown?
A listing’s promises are the reason people buy. Each one gets its own row: what was promised, what evidence would settle it, and what we could actually find. We never call a claim false — only whether proof proportionate to it exists on the public record.
| Claim | Status | What we found |
|---|---|---|
| Quality-testing claim “…Prebiotic: Fiber formula Healthy Bowel: Promotes regularity* Well-Tolerated: No bloating, cramping, or gas* 3rd Party Contents Certified: This product has been third-par” | Claimed, not verifiable We looked for: the observed listing, saved brand product page, the NSF/ANSI 173 certified-products registry, any linked COA or test report; IFOS, USP, Informed-Sport were not queried | No named laboratory or lot-specific certificate was found for this exact product. No exact brand product page was available for a document check. Under NSF/ANSI 173, NSF lists Thorne® products, including Thorne® L-Glutamine Powder, but not this exact SKU. IFOS, USP, and Informed-Sport were not checked in this record. This is a public-evidence limit, not a finding that testing did not occur. |
| Benefit claim “…Prebiotic: Fiber formula Healthy Bowel: Promotes regularity* Well-Tolerated: No bloating, cramping, or gas* 3rd Party Contents Certified: This product has been third-par” | 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
Why is this shown?
An ingredient can be well-studied at one amount and barely studied at the amount in your bottle. This lines the label up against the doses researchers actually used. It answers ‘are these the same numbers?’ — never ‘should you take this?’
| Ingredient | Where this label sits | Reading |
|---|---|---|
| Dietary Fiber | shaded = doses used in studies (3 g–10 g) · bar = this label | 7 g — 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.
Verifiability profile — 2 of 6 public signals
✓ Supplement Facts visible in photos✓ Brand's own store found· Per-serving dose established — not published· UPC / GTIN published — not published· Found in NIH's label catalog (DSLD) — not published· Third-party lab named or registry-certified — not published
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-a98f4307 (internal — no barcode published, which limits cross-checking) |
| Brand | THORNE |
| Source listing identifier | B00BGJ7EBC |
| Retailer listing title | THORNE - FiberMend - Prebiotic Fiber Powder to Help Maintain Regularit… show full titleTHORNE - FiberMend - Prebiotic Fiber Powder to Help Maintain Regularity and Balanced GI Flora* - 11.6 Oz |
| USPTO brand owner | Thorne Research, Inc. · CORPORATION · IDAHO, USA; SOUTH CAROLINA, USA |
| Owner filed address | 25820 Highway 2 West, Sandpoint, IDAHO 83864, UNITED STATES |
From the label (photo-read)
| Serving size | One Scoop (11 g) |
| Servings per container | 30 |
| Net weight | NET WT 11.6 OZ (330 G) |
| Badges printed on pack | Third-Party Certified, DAIRY FREE, SOY FREE, GLUTEN FREE |
Supplement Facts panel (photo-read):
| Ingredient | Amount per serving | Reading confidence |
|---|---|---|
| Calories | 45 | High clearly legible in the photo |
| Total Fat | 1 g | High clearly legible in the photo |
| Total Carbohydrate | 9 g | High clearly legible in the photo |
| Dietary Fiber | 7 g | High clearly legible in the photo |
| Soluble Fiber | 6 g | High clearly legible in the photo |
| Partially Hydrolyzed Guar Gum | 8 g | High clearly legible in the photo |
| Rice Bran | 2.5 g | High clearly legible in the photo |
| Arabinogalactan (from Larch) (Larix spp.) | 300 mg | High clearly legible in the photo |
| Pectin (from Apple) | 150 mg | High clearly legible in the photo |
| Green Tea Phytosome (Camellia sinensis extract (leaf) decaff | 50 mg | High clearly legible in the photo |
Claims printed on the packaging:
“DIETARY SUPPLEMENT” · “Keep your gut healthy and in balance with a soluble prebiotic fiber that helps maintain healthy metabolism, promotes reg” · “Commitment to quality” · “Thorne champions the cleanest manufacturing, the most comprehensive testing, and the purest, highest-quality ingredients” · “100,000+” · “Tests carried out each year in our state-of-the-art Quality Control laboratories.” · “Stimulates the growth of beneficial bacteria in the GI tract*” · “Enhances satiety* (to keep you feeling fuller, longer)”
Read by a vision model from 8 listing photos — verbatim extraction; OCR errors possible. Spot a mistake? It will be corrected on review.
Where it sells
We found a brand storefront, but we could not match any price on it to this exact product when we checked.
Official brand domain: www.thorne.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.
Related research & consistency
prebiotic fiber (inulin-type) — NIH ODS — Fiber overview (MVMS context) · PubMed search: inulin prebiotic randomized trial · WebMD search: inulin · ClinicalTrials.gov — 22 registered studies
ℹ Use pattern in research: daily use; effects build over weeks as gut flora shift.
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 lc-a98f4307 · built September 03, 2026 · lookcloser.ai · corrections@lookcloser.ai