Guides
Reference articles on supplement documentation and platform verification. Factual, current, and written to be read once and acted on. Figures are configured and dated, not hardcoded.
What does Amazon require for supplement listings in 2026?
Every dietary supplement listing on Amazon now requires third-party cGMP verification through an Amazon-approved TIC provider. What sellers must have ready, how the TIC Direct Validation path works, and what verification costs.
Updated 2026-07-245 min read
What should you do when an Amazon listing is suspended over documentation?
A step-by-step response plan for supplement listing suspensions: read the notification precisely, audit what you hold, engage a TIC provider, commission testing if needed, and respond inside the stated window.
Updated 2026-07-244 min read
How do you read a Certificate of Analysis?
The anatomy of a supplement COA: header and accreditation, sample identification, the results table, non-detect notations, why 'Conforms' is not a result, and what makes a COA unusable for verification.
Updated 2026-07-245 min read
What is your contract manufacturer responsible for, and what stays yours?
The cannot-contract-out doctrine for supplement brands: the manufacturer holds the records, the brand holds the liability. What to expect a contract manufacturer to provide, and which duties no contract can transfer.
Updated 2026-07-244 min read
How does TIC verification work and what does it cost?
The Amazon TIC verification flow step by step: provider choice, document handover, authenticity checks, direct submission, with current review and retest cost figures and the seven reasons submissions bounce.
Updated 2026-07-244 min read
Which compliance questions should you ask before signing a contract manufacturer?
Seven compliance questions to put to a contract manufacturer before signing: registration attestation, cGMP certification and issuer, per-lot COA scope, document turnaround, quality agreements, spec-change handling, and a sample document set.
Updated 2026-07-244 min read
What is 21 CFR Part 111, and what does it mean for a brand that doesn't manufacture?
FDA's cGMP rule for supplements sets no numeric limits: it requires specifications, identity testing, a quality unit, and records. Outsourcing does not move it.
Updated 2026-08-168 min read
Amazon supplement verification checklist for 2026
A step-by-step checklist for Amazon supplement verification: inventory SKUs, collect documents, check the document window, choose a provider, hand over, track.
Updated 2026-08-175 min read
Certificate of Analysis vs. Certificate of Conformance vs. spec sheet
Three documents get confused in a compliance review: what a COA, a Certificate of Conformance, and a spec sheet each prove, and why neither replaces a COA.
Updated 2026-08-176 min read
Do I need a Certificate of Analysis for every lot, or just the product?
Part 111 lets a manufacturer verify finished batches on a sampling plan, not every one, but a COA is a per-lot document. What that means for your lots.
Updated 2026-08-176 min read
What do FDA warning letters to supplement firms actually cite?
Five real FDA warning letters to supplement firms and the recurring citations: specifications, identity testing, batch records, own-label distributor duty.
Updated 2026-08-176 min read
cGMP vs. GMP Certified vs. NSF Certified for Sport vs. USP Verified: what do they mean?
cGMP is a federal regulation every US supplement maker must follow. GMP Certified, NSF Certified for Sport, and USP Verified are separate, voluntary programs.
Updated 2026-08-176 min read
Heavy metals testing for supplements: what a reviewer looks for on a COA
Arsenic, cadmium, lead, mercury on a COA: why per-day exposure differs from concentration, why chemical form matters, and which authorities set the numbers.
Updated 2026-08-175 min read
How long is a Certificate of Analysis valid for Amazon's supplement verification?
Amazon's approved TIC providers accept a COA only inside a document-age window. What the window is, why sources disagree, and how to keep every SKU inside it.
Updated 2026-08-176 min read
How much does supplement compliance cost per SKU per year?
The recurring cost model: TIC review vs. retest, how often it recurs, consultant rates, and what a plan costs per product, with the arithmetic shown and nothing invented.
Updated 2026-08-316 min read
How to choose an Amazon-approved TIC provider for supplements
What differs between Amazon-approved TIC providers (approval scope, turnaround, own lab or not, pricing) and prepping documents so a review passes first time.
Updated 2026-08-176 min read
How should I organize supplement compliance documents by lot?
A practical filing system: product, then lot, then documents. What to keep, how to name files, retention under 21 CFR 111.605, and where a spreadsheet breaks.
Updated 2026-08-176 min read
What is the '100 percent' identity testing rule under 21 CFR Part 111?
21 CFR 111.75(a)(1) requires identity testing on every ingredient lot, with a narrow petition exemption. What it means for a brand relying on a manufacturer.
Updated 2026-08-176 min read
Microbial testing for supplements: what a Certificate of Analysis should show
Total aerobic count, yeast/mold, and specified organisms on a COA: the USP <2021>/<2022>/<2023> chapters behind them, and why 'conforms' isn't a result.
Updated 2026-08-175 min read
What does Proposition 65 require of a supplement brand, and what changes in 2026?
California's Prop 65 warning duty, the naturally occurring exemption, how it reaches Amazon listings, and what OEHHA's Omnibus 2026 draft proposes to change.
Updated 2026-08-176 min read
What should a quality agreement with a contract manufacturer include?
What a quality agreement covers: specs, testing or COA delivery, record access, change notice, recall, and why Part 111 pushes toward having one.
Updated 2026-08-176 min read
Regulatory consultant or compliance software: do supplement brands need both?
What a consultant does that software can't (judgment, launches, remediation) and what software does that a consultant on retainer can't (watching every day).
Updated 2026-08-176 min read
Serious adverse event reporting: what a supplement brand is required to do
Federal law requires the label's 'responsible person' to report a serious adverse event to FDA within 15 business days, and to keep records for 6 years.
Updated 2026-08-176 min read
Spreadsheet or software for supplement compliance documents?
A spreadsheet tracks one manufacturer and a few SKUs fine. Where it breaks as lots and manufacturers multiply, and what knowing what's missing requires.
Updated 2026-08-176 min read
Structure/function claims vs. disease claims: where's the line on a supplement label?
A structure/function claim describes a body role; a disease claim implies curing one. FDA's criteria, its disclaimer, and why a listing is labeling too.
Updated 2026-08-176 min read
Supplement compliance software compared: the categories, as of 2026
AI label tools, cannabis COA software, retailer supplier networks, manufacturer QMS/ERP: what each does and doesn't do, from vendors' own pages, as of 2026-08.
Updated 2026-08-175 min read
What do Costco, Sprouts, and Thrive Market ask supplement suppliers for?
Costco, Sprouts, and Thrive Market's own public supplier pages, compared: audit standards, documents, and ingredient rules for a supplement supplier.
Updated 2026-08-176 min read
What happens when a supplement's Certificate of Analysis expires?
A COA doesn't legally expire, but past the document-age window it stops being reviewable. The chain to listing risk, and the 60/30/14 approach that avoids it.
Updated 2026-08-175 min read
What is a cGMP certificate, and how does a brand that doesn't manufacture get one?
A cGMP certificate is a third-party audit of one facility, not an FDA document. What it covers and how a non-manufacturing brand gets one.
Updated 2026-08-176 min read
What is a TIC provider, and why does Amazon require one for supplements?
What a TIC (Testing, Inspection and Certification) provider is, what it reviews for Amazon verification, and why sellers can't submit documents directly.
Updated 2026-08-175 min read
What is an NDI notification, and when does a supplement need one?
A new dietary ingredient wasn't marketed in a US supplement before October 15, 1994. The 75-day notification, who files it, and what to ask a manufacturer.
Updated 2026-08-175 min read
What does Whole Foods Market ask supplement suppliers for?
What Whole Foods Market's own pages say a supplement supplier must provide: ingredient standards, claims rules, insurance, and where the pages stay silent.
Updated 2026-08-176 min read