Which pet supplement brands currently list NASC certification or publish Certificates of Analysis for taurine products?

1. NASC membership named in company materials — what the reporting shows

Multiple vendor pages and brand statements in the provided reporting identify themselves as NASC-certified or NASC members: Wholistic Pet Organics explicitly promotes having earned the NASC Quality Seal ^[1], NOW® Foods/ NOW® Pets describes its NASC certification and positions the seal as assurance that its pet products adhere to NASC standards ^[2], Wonder Paws advertises being a NASC Primary Supplier and the right to display the Quality Seal ^[3], Honest Paws announces having earned the NASC Quality Seal ^[4], and VetriScience discusses the NASC Quality Seal as part of its quality messaging ^[5]; an aggregated list of products carrying the NASC seal is also presented by HolisticPetInfo as an index of products bearing that mark ^[6].

2. What “NASC certification” actually signals, per the sources

The National Animal Supplement Council’s Quality Seal is described across the reporting as a membership and audit-driven program requiring facility audits, adherence to quality-control procedures, random testing and labeling compliance; the NASC seal is represented as a marker that a manufacturer has passed independent third‑party audits and meets the council’s quality system requirements ^{[7] [8] [6] [9]}. Industry-facing guidance and service providers similarly frame NASC status as an assurance of manufacturing and labeling controls rather than a guarantee of ingredient potency for every lot ^{[10] [9]}.

3. Certificates of Analysis (COAs) — where the record is silent

None of the supplied snippets contain explicit documentation that any of the named brands publish Certificates of Analysis for taurine-containing products or for taurine assays specifically; the materials provided discuss NASC membership and general product-testing regimes but do not show taurine COAs or a direct link to batch-level analytical reports for taurine on any brand page in the reporting ^{[1] [2] [3] [4] [5] [6] [10]}. Because COA publication is a product- or batch-specific practice and not required by the NASC text excerpts here, the absence of a COA in these sources cannot be read as proof that a company does not publish them elsewhere — it only means the supplied reporting does not contain that evidence ^{[7] [10]}.

4. How to interpret the gap and next verification steps

Given the reporting’s emphasis on NASC audits and seals, the most reliable next steps for a definitive answer are to inspect individual product pages or contact brands directly for batch COAs, or to consult the NASC membership/product database where products bearing the Quality Seal are catalogued; the sources describe NASC’s audit program and product-listing practices but do not replace hands‑on verification of COAs ^{[7] [6] [9]}. Industry guides and certification-service pages note that NASC membership requires ongoing compliance and audits but do not standardize COA publication practices, so absence of an overtness about taurine COAs in brand marketing is common and not conclusive ^{[10] [9]}.

5. Balanced takeaway and hidden agendas to watch for

The brands cited in the sources use NASC affiliation as a quality signal ^{[1] [2] [3] [4] [5]}, and industry players and consultants promote NASC certification as a competitive advantage ^{[10] [9]}; this creates an implicit marketing incentive to highlight seals rather than publish raw analytical data publicly, which may explain why COAs for taurine are not visible in the sampled reporting. The reporting does not allege bad faith by any brand, but readers should recognize that NASC branding and COA publication are distinct practices and that only direct product/batch documentation or a company’s COA portal will confirm taurine assay data — information not included in the supplied sources ^{[7] [10] [6]}.