“GMP-certified” describes factory processes, not what is in the bottle. The claim does not name a certifier or public register that a shopper can check.

NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg
Checked against public sources on July 26, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
FDA recall appears in this brand's history. An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.
“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.
The checks, one by one
The public sources did not settle the marketing promises on this label.
◐Partly confirmed1
Ingredient research can support context, but it is not a trial of this exact product.
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
FDA recall appears in this brand's history
An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.
Evidence and sources
This recall is not about the product on this page. Now Foods recalled a different product on May 8, 2025. FDA has since closed that case. The recalled item was “NOW Nutritional Yeast Powder, Nt. Wt. 10oz. UPC 7 33739 02460 2”. …
Locked evidence record →Open the full source-linked findingReviews rose from 140 to 141 between May 14 and June 1, 2026 — no sudden jump.
A count that moves steadily is ordinary. A sudden burst is what deserves a closer look.
Evidence and sources
Written reviews rose from 140 to 141 between May 14 and June 1, 2026. The largest rise inside any single 30-day window was about 1, so the count moved in steps rather than in one burst.
Locked evidence record →Open the full source-linked findingWhat remains open 3
- Panel amounts still need a clearer source image.
- We have not found a public label filing for this exact product.
- Brand ownership is not settled in this record.
These are evidence gaps, not strikes against the product.
Price check for this exact product
Amazon
Exact UPC/GTIN matchmatching UPC/GTIN · checked Jul 26, 2026
View on Amazon ↗iHerb
Exact UPC/GTIN matchmatching UPC/GTIN · checked Jul 26, 2026
View on iHerb ↗Target
Not confirmedWe only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Target ↗Walmart
Not confirmedWe only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Walmart ↗Same UPC/GTIN observed across 2 sellers. Amazon was lowest at $24.70; iHerb was highest at $26.94 — a $2.24 range at check time.
No official brand storefront is confirmed in this record. That is neutral, but it prevents a direct brand-price, label, review, and document check.
Reference prices only · no affiliate links · every compared seller must publish the matching UPC/GTIN.
Want to inspect the evidence?
The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Record built July 26, 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.