Who makes Kirkland Signature OptiFiber Prebiotic Fiber Supplement, 26.8 oz (190 Servings)?

No recall or enforcement action on file for Kirkland Signature OptiFiber or any Kirkland fiber/wheat-dextrin product. The recall route — usually the fastest way a private-label supplement co-packer gets named — surfaces no maker for this product.

The DSLD label for OptiFiber lists a single contact of type Manufacturer whose name is just "Kirkland Signature" (no street address, no third-party company), and carries the marketing statement "Compare to Benefiber" over a wheat-dextrin "natural prebiotic fiber" formula. As a dietary supplement it has no NDC, so the FDA NDC/DailyMed and Drugs@FDA (ANDA-applicant) routes that name makers for Kirkland's OTC drugs do not exist here — there is no application holder to trace, and the label names no co-packer.

The only archived OptiFiber listing is the older .product.html template (item 100517315, 26.8 oz, 2025-02-07 snapshot), which embeds no manufacturer field at all. Costco's newer product-page template — the one that names real makers on other Kirkland supplements (PHARMAVITE on fish oil, WN PHARMACEUTICALS on krill oil, INTERNATIONAL VITAMIN on the Daily Multi) — has no archived snapshot for OptiFiber, and costco.com blocks automated fetch/save. Flagged for a manual browser check of the live OptiFiber page's mfName field.

Kirkland Signature is a participating brand with 30+ USP Verified SKUs, but all of them are vitamins, minerals and omega-3s (calcium citrate, CoQ10, Daily Multi, vitamin C, fish oil, etc.); no fiber, wheat-dextrin, or OptiFiber product is listed as USP Verified, and the OptiFiber label carries no USP mark. USP verification would not disclose the manufacturer even where present, so this route yields no maker.

Smyth v. Costco Wholesale Corp., 2:20-cv-04247 (E.D.N.Y., filed 2020-09-11), challenges the product's "100% natural" labeling, arguing that its sole ingredient, wheat dextrin, is created from wheat starch through a multi-stage chemical process (hydrochloric acid plus enzymes). The complaint names only Costco Wholesale Corporation and identifies no manufacturer, co-packer, or maker of the product.

No news article, executive statement or retailer disclosure names the maker. The one who-makes-it blog on the product (rvandplaya.com) guesses "It may be that Nature Made creates Kirkland Optifiber" but adds "this can not be said with any certainty" and "we still don't have a conclusive answer" — an unsourced guess, not evidence. No consistent maker circulates.

Structurally uninformative here: wheat-dextrin fiber sold in US warehouses is processed and packed domestically, so absence of import records proves nothing about the co-packer (tier 5 caveat). No route to a maker via customs data.