Peptide COA registry data
By The Merit Research Team
Merit Verified maintains a public registry of independent peptide test results — 5,617 COAs across 57 vendors and 22 independent labs. Every record is a third-party test issued by a laboratory independent of the vendor.
- COAs on file
- 5,617
- Lots tracked
- 1,166
- Independent labs
- 22
- Vendors with COAs
- 57
Snapshot as of 2026-07-13. Updated each catalog re-index.
What each COA record captures
Each entry in the Merit Verified COA corpus links a specific peptide lot to the independent test that was run on it. Records include:
Compound identity
Confirmation that the tested sample is the claimed compound, established by mass spectrometry (MS). Identity testing is distinct from purity — it rules out substitution, not just dilution.
Measured purity (%)
The fraction of the tested sample confirmed as the target compound by HPLC or HPLC-MS. Expressed as a percentage. Values at or above 98% are typical for quality research peptides; values below 95% are a red flag.
Testing method
The analytical technique used: HPLC (High-Performance Liquid Chromatography) or HPLC-MS (HPLC with mass spectrometry). HPLC-MS provides both purity and identity confirmation in a single test.
Test date
The date the independent laboratory ran the test. COA recency matters: a test from 2022 does not certify a lot shipped in 2025. Merit Verified applies age decay in the Merit Score to account for this.
Issuing lab
The independent laboratory that issued the COA. Each lab in the registry has its own profile page at meritverified.org/labs. An independent lab has its own website, physical address, and accreditation (ISO 17025 or CLIA) independent of any vendor.
Lot / batch number
The production lot identifier linking the COA to a specific manufacturing run. A legitimate COA is lot-specific — it certifies that batch, not the vendor's entire catalog.
Methodology
Source. COA data is collected from vendor-published sources and publicly accessible lab databases. Merit Verified indexes third-party documents — it does not produce, commission, or alter COAs.
Independence check. Each lab is evaluated for independence from the vendors it tests. A lab that only appears in vendor marketing, has no public website, or shares ownership with a vendor is flagged; its COAs receive reduced evidentiary weight in the Merit Score.
Scoring. The Merit Score (0–100) is derived from COA evidence only: count, breadth across peptides and labs, recency, and measured purity. It is not a safety rating, a regulatory clearance, or a purchasing recommendation. Full scoring methodology is at meritverified.org/about.
Limits. A COA certifies a tested lot, not every vial a vendor ships. Purity is not the same as safety — HPLC does not screen for residual solvents, heavy metals, endotoxins, or microbial contamination. These require separate tests that most vendors in this market do not commission.
Frequently asked questions
How many peptide COAs has Merit Verified indexed?
Merit Verified has indexed 5,617 independent certificate-of-analysis (COA) records across 57 vendors and 22 independent testing laboratories as of the most recent build. Each record links a specific peptide lot to its tested purity (measured by HPLC or HPLC-MS), the issuing lab, and the test date. The corpus is updated on a rolling basis as new third-party COAs are indexed.
Where does Merit Verified get its COA data?
Merit Verified collects COA data from vendor-published sources and publicly accessible lab databases. Each COA is attributed to the independent laboratory that issued it. Merit Verified does not produce or alter COAs — it indexes third-party documents issued by labs that are independent of the vendor. The methodology for scoring COA evidence is published at meritverified.org/about.
What is the Merit Verified COA corpus?
The Merit Verified COA corpus is a structured registry of 5,617 independent peptide test results, spanning 57 vendors and 22 testing labs. It records: compound identity, measured purity percentage, testing method (HPLC or HPLC-MS), lot number, test date, issuing lab, and vendor. The corpus is the data foundation for the Merit Score — a 0–100 evidence rating per vendor derived only from observable, independently verifiable data.
Is Merit Verified COA data free to access?
Yes. The COA registry at meritverified.org is publicly accessible at no cost. Every vendor profile, COA record, and lab page is browsable without an account. Merit Verified earns revenue through disclosed affiliate links that do not affect scoring, ranking, or inclusion.
How often is the Merit Verified COA database updated?
The COA database is updated on a rolling basis by automated indexing of publicly available COA sources. The Merit Score on each vendor profile reflects the most recent snapshot. The corpus statistics on this page reflect the build date — 2026-07-13. For the current live count, see meritverified.org/about.