Checked against public sources between July 28 and September 2, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
Research links are available for prebiotic fiber. Use the linked research to check whether the ingredient and outcome you care about are actually connected. Ingredient evidence does not verify this 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.
| Calories | 10 |
|---|---|
| Total Carbohydrate | 6 g |
| Dietary Fiber | 5 g |
| Total Sugars | 0 g |
| Sunfiber® Guar Fiber | 6 g |
| Bifidobacterium lactis | 8 Billion CFU |
Printed on the package: INFORMED CHOICE · NON GMO Project VERIFIED · GLYPHOSATE RESIDUE FREE · clean label PROJECT CERTIFIED · LOW FODMAP CERTIFIED · K · TRU-ID · Kosher
We read 6 lines from the package photograph. It is our transcript of the label, not the manufacturer’s panel, and it may be incomplete.
1 promise needs a closer look.
Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed.
Ingredient research can support context, but it is not a trial of this exact product.
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.
Headlines first. Open evidence only when you want the source trail.
These are evidence gaps, not strikes against the product.
Filed address
CALIFORNIA, USA) DBA Regular Girl; 1601 Utica Avenue South, Suite 109, Minneapolis, Minnesota 55416, 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 ↗
We could not match an amount on this product to a studied range for the same ingredient, so these links are ingredient background rather than a measurement of this product.
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 5 g of prebiotic fiber (inulin-type) per serving. Studies we found used 3 g–10 g a day, so this sits inside that range.
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
$1.00 per labeled serving
matching UPC/GTIN · checked Sep 2, 2026
View on Amazon ↗Official shopping lead; excluded from exact price comparisons.
Sunfiber® GI 30-Day Powder · Default Title. Confirm the package UPC/GTIN before buying.
Check brand website ↗We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
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The brand-page price is shown as a shopping lead only. It is excluded from the exact-product price difference because the page does not publish this record's matching UPC/GTIN.
Reference prices only · no affiliate links · every compared seller must publish the matching UPC/GTIN.
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.