Supplement Certification Programs: How They Work, What They Prove, and How to Verify
Recorded sources last checked between June 15, 2026 and October 4, 2026. 35 of 35 recorded claims have no open issue recorded. Source check due December 15, 2026. The page also includes 3 Inventory Ready estimates as of August 21, 2026; estimates are not counted as sourced claims.
By Greg Huang, founder since 2009 in the dietary supplement and nutrition industry
The short answer
This guide compares six programs that apply to dietary supplements, and only one of them, cGMP compliance under 21 CFR Part 111, is legally required. The other five are voluntary programs that differ in what they test and how they obtain samples.
This guide covers three things: which certification fits your sales channel, how each program actually works, and how to verify a certification claim using public databases. For a side-by-side factual comparison, see our certification comparison tables. For cost breakdowns and prioritization by brand stage, see our choosing certifications guide.
Dietary supplement manufacturers must comply with 21 CFR Part 111 (Current Good Manufacturing Practice for dietary supplements). This includes requirements for personnel, facilities, equipment, production, laboratory operations, and record-keeping.
Which Certification for Which Channel
Your sales channel determines which certifications you need. Start here, then evaluate program specifics in the sections below.
Selling on Amazon
You likely need: A third-party cGMP audit or certification (a current GFSI food safety certification at the facility may satisfy it), submitted through an Amazon-authorized TIC provider
Amazon's dietary supplements policy requires every dietary supplement to be made in a cGMP-compliant facility, shown by an audit or certification from an accredited third party; FDA inspections and private, first-party, or consulting audits are not accepted, and a current GFSI food safety certification may satisfy the requirement. Documents reach Amazon through an authorized TIC service provider, not directly. Amazon's help page listed eight such providers for US dietary supplements on October 4, 2026 and says the list is updated monthly, so check the current list in Seller Central. When Amazon requests documents, the deadline is the "Address issue by" date shown in Account Health.
Selling on Amazon and want the fastest compliance path
You likely need: Certification from an organization in Amazon's Compliance Fast-Track program
Once a product is certified by a participating organization, the organization shares its compliance information with Amazon, so you do not submit compliance documentation yourself. Amazon's help page listed seven participating organizations for dietary supplements on October 4, 2026, including NSF, USP, and INFORMED.
Targeting professional athletes or sports nutrition
You likely need: NSF Certified for Sport or Informed Sport
NSF states that Certified for Sport is the only independent third-party certification program recognized by USADA and three professional leagues (MLB, NHL, and CFL); it tests for 295+ banned substances. Informed Sport tests every batch for more than 285 substances prohibited in sport.
Selling through pharmacies or healthcare channels
You likely need: USP Verified Mark
Widely required in pharmacy and healthcare channels. Combines a facility GMP audit with ongoing finished-product testing for identity, potency, purity, and dissolution, listed in a public registry. Relatively few supplements carry this mark, which makes it a strong differentiator in clinical settings.
Need facility-level credibility beyond cGMP
You likely need: NSF/ANSI 455-2 GMP Certification
A voluntary facility certification to the NSF/ANSI 455-2 standard, audited by an ANAB-accredited certification body. What matters for vetting: the audit is third-party, and the certifying body's public listing lets anyone check a facility's current status.
For prioritization by brand stage and budget, see our choosing certifications guide. For Amazon-specific compliance details, see our Amazon compliance guide.
How Each Program Works
Each program below is described on five points: what it tests (scope), how it obtains samples (sample source), what information is publicly available (transparency), who pays and who benefits (independence), and what it does not cover (limitation). These points reflect how Inventory Ready evaluates any claim: see our assessment method.
cGMP (21 CFR Part 111)
FDA (enforced, not issued) · Legal baseline
Scope: Manufacturing practices, quality systems, testing, and recordkeeping for anyone who manufactures, packages, labels, or holds a dietary supplement. The holding requirements do not apply to a retail establishment holding supplements for the sole purpose of direct retail sale to individual consumers.
Sample source: Not applicable. cGMP is a regulatory framework, not a testing program. The FDA inspects facilities for compliance.
Transparency: The FDA does not issue cGMP certificates after an inspection. Its Data Dashboard publishes inspection classifications and cited observations, some Form 483s are published in its FOIA Electronic Reading Room, and warning letters are posted on fda.gov.
Independence: Government-enforced. The FDA decides when to inspect; the facility does not choose or hire the inspector.
Limitation: cGMP sets the floor, not the ceiling. Part 111 requires product specifications for the finished batch, but the FDA does not test supplements before they are sold and checks compliance through inspections, so a cGMP obligation is not proof that every product matches its label.
NSF/ANSI 455-2 GMP Certification
NSF or another accredited certification body (to the NSF/ANSI 455-2 standard) · Facility
Scope: Facility audit against the NSF/ANSI 455-2 standard, which builds in 21 CFR Part 111 and Part 117, by a certification body accredited by the ANSI National Accreditation Board (ANAB).
Sample source: Auditors visit the facility. No product samples are tested; this is a manufacturing practice audit.
Transparency: Because NSF/ANSI 455-2 is a published standard, more than one accredited body can certify a facility to it, so a certificate is to the standard, not to a single company. Confirm a facility in the certifying body's public registry. For NSF, that is the 455 GMP directory at info.nsf.org/Certified/455gmp.
Independence: Manufacturers hire an accredited certification body, such as NSF, to audit the facility. These are independent third-party organizations, not industry trade groups. NSF is one of Amazon's authorized TIC service providers for dietary supplements.
Limitation: Facility-level only. Does not test individual products. NSF/ANSI 455-2 is the current GMP certification for supplement manufacturers; it replaced NSF's older NSF/ANSI 173 GMP registration. NSF still runs a separate GMP registration program for dietary ingredients, China-market supplements, and warehousing/distribution.
SQF Certification
SQFI-licensed certification bodies (program owner: SQF Institute, part of FMI) · Facility
Scope: Food safety and quality management system. The GFSI-benchmarked Food Safety Program includes a Dietary Supplement Manufacturing code; a separate Quality Program builds on a food safety plan, and a Fundamentals Program serves smaller sites.
Sample source: Certification bodies audit the site's food safety management system. Product testing is part of the site's own program, not SQF's.
Transparency: SQFI's Certified Site Directory is public: it searches certified sites by site name, certificate number, food sector category, and country without a login.
Independence: Audits are conducted by certification bodies that SQFI licenses and that are accredited to ISO/IEC 17065, not by SQFI itself.
Limitation: Certification does not replace 21 CFR Part 111 cGMP compliance, which applies to dietary supplements regardless. SQF food safety certification covers food safety; quality management is the separate SQF Quality Code that a site adds on top.
USP Verified Mark
United States Pharmacopeia · Product
Scope: Tests individual products for identity, potency, purity, and contaminants. Also verifies dissolution (whether the product breaks down properly for absorption).
Sample source: USP tests product samples and audits the manufacturing facility against 21 CFR Part 111 and USP General Chapter <2750>, then buys USP Verified products off the shelf for follow-up testing.
Transparency: Public searchable database at quality-supplements.org, where USP's Verified Product Finder searches all USP Verified products.
Independence: The program is open to manufacturers of finished dietary supplements, which apply to enroll their products. USP is a private, non-profit scientific organization with more than 200 years of work on medicine quality standards, not an industry trade group.
Limitation: Product-specific, not facility-wide. A company may have one USP Verified product while others are not verified. Only a small fraction of supplements carry this mark.
NSF Certified for Sport
NSF International · Product
Scope: Tests products for 295+ substances banned by major athletic organizations (NSF's figure), verifies that the label matches the contents, and screens for unsafe levels of contaminants.
Sample source: NSF tests the finished product, then tests production lots for banned substances and lists the tested lots online. The product must come from a GMP-certified facility that NSF audits on a schedule set by the facility's grade.
Transparency: Public searchable database at nsfsport.com, searchable by product name, company name, or lot number.
Independence: Manufacturers apply to NSF for certification. NSF is an independent third-party organization. NSF takes part in Amazon's Compliance Fast-Track program for dietary supplements.
Limitation: Product-specific. Only certified SKUs are covered. Primarily relevant for sports nutrition products. NSF states it is the only independent third-party certification program recognized by USADA and three professional leagues (MLB, NHL, and CFL).
Informed Sport / Informed Choice
LGC Group · Product
Scope: Tests for more than 285 substances prohibited in sport. Two tiers: Informed Sport tests every batch before release; Informed Choice tests at least twelve randomly selected lots a year and does not guarantee that every batch has been tested.
Sample source: For Informed Sport, the brand submits every batch for testing before release, and LGC also buys certified products from retail and tests them blind. Informed Choice is built on that retail buying: LGC purchases products from stores or websites and tests them.
Transparency: Informed Sport: searchable database at sport.wetestyoutrust.com, by brand, product name, or batch number, listing certified products with their tested batches. Informed Choice: tested lots of certified products are listed at choice.wetestyoutrust.com.
Independence: The brand enters a certification agreement with LGC, which tests samples in its own laboratories using an ISO 17025-accredited screen. LGC is a testing company, not a supplement industry trade group.
Limitation: Its testing screens for banned substances; LGC's program pages do not describe label-accuracy or potency testing. Informed Choice does not guarantee that every batch has been tested; Informed Sport does.
How to Verify a Certification Claim
When a manufacturer claims a certification, you can check it yourself. Not all programs have public databases, but many do. This is the same process Inventory Ready uses when confirming certifications for our directory listings.
The scale of the problem is measurable. In Inventory Ready's certification verification gap study, 56.6% of 747 certification claims published by assessed supply-chain companies cite credential types with no public registry to check them against.
| Program | Public database | What you can check |
|---|---|---|
| NSF/ANSI 455-2 GMP | NSF 455 GMP listing → | Search by company name |
| NSF GMP registration | NSF GMP registration listing → | Ingredient, warehousing, and other registrations |
| USP Verified | USP Verified products → | Search all USP Verified products |
| NSF Certified for Sport | NSF Sport directory → | Search by product, company, or lot number |
| SQF | SQF Certified Site Directory → | Search by site name, certificate number, or food sector category |
| Informed Sport | Informed Sport directory → | Search by brand, product name, or batch number |
| FDA Registration | None | No public searchable database. Ask manufacturer for registration number. |
| NPA GMP | NPA GMP Certified Companies → | Search the public certified-companies list |
If a manufacturer claims a certification and it does not appear in the public database, that does not mean the claim is false. The database may not be current, the entity name may differ from the trade name, or the certification may have lapsed. Ask the manufacturer for documentation and check the certification body directly if needed.
Why Sample Source Matters
How a program obtains its test samples shapes the credibility of results. Most product programs start from samples the manufacturer submits, so the company being certified controls what reaches the lab. This enables consistent lot tracking and frequent retesting, but the tested product may not represent what a consumer buys off a shelf or website. Some add retail checks: USP buys USP Verified products off the shelf for follow-up testing, and LGC buys Informed Sport products from retail and tests them blind.
Other programs build certification on anonymous purchase, buying products off the shelf or from brand websites the same way a consumer would. This closes a gap in manufacturer-submitted models, where the company being certified selects the sample. The trade-off: anonymous purchase tests whatever is currently available for sale, not specific production lots submitted by the manufacturer.
Neither approach is inherently better. Manufacturer-submitted testing enables more frequent, lot-specific verification. Anonymous purchase testing reflects what consumers actually receive. The question for brand owners is which model better serves their credibility story with their target audience.
Frequently Asked Questions
Is cGMP the same as “GMP Certified”?
No. cGMP compliance under 21 CFR Part 111 is a legal requirement enforced by the FDA. “GMP Certified” typically means a facility has passed a voluntary third-party audit by an organization like NSF or the Natural Products Association. The legal requirement and the voluntary certification are related but not the same thing.
Do I need both a facility certification and a product certification?
It depends on your channel. Amazon requires a third-party cGMP audit or certification of the manufacturing facility (a current GFSI food safety certification at the facility may satisfy it), submitted through an Amazon-authorized TIC provider. If you sell to athletes, add product-level banned substance testing such as NSF Certified for Sport or Informed Sport. Start with facility-level cGMP verification, then add product certifications as your distribution expands.
How much do supplement certifications cost?
Costs vary significantly by program, facility size, and number of products. For a detailed cost breakdown and prioritization by brand stage, see our choosing certifications guide.
Primary sources
- 21 CFR Part 111 (cGMP requirements for dietary supplements)
- FDA Data Dashboard: inspections (Inspection classifications, citations, and published Form 483s)
- Amazon dietary supplements policy (Seller Central help page, United States)
- Amazon authorized TIC service providers (Seller Central help page with the provider list and document-request process)
- Amazon Compliance Fast-Track (Seller Central help page with the participating organizations)
- Amazon TIC expansion (December 2025) (NutraIngredients coverage of Amazon's expanded compliance requirements)
- NSF/ANSI 455-2 GMP Certification (NSF GMP certification and registration overview)
- USP Dietary Supplement Verification Program (USP program overview, including audits and off-the-shelf testing)
- NSF Certified for Sport (NSF certification steps)
- Informed Sport / Informed Choice (LGC Group comparison of the two programs)
- SQF certification programs (SQF Institute program overview)
Dig into any single program
Our certifications index has a page per program: what it covers, who runs it, and how to confirm a certificate. Browse the certifications index →
Greg Huang, founder since 2009 in the dietary supplement and nutrition industry
Founder of Inventory Ready. Previously founded and operated multiple consumer brands in the dietary supplement and nutrition industry since summer 2009.
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