Vendor Directory

Polaris runs COAs per product rather than a single page — each listing carries its own Chromate Analytics or Janoshik report. Eleven tested peptides average 99. Read full review →

Last reviewed: Jul 18, 2026

The strongest purity profile among new vendors in this review cycle: seven Finnrick tests averaging 99.84% with a floor at 99. Read full review →

Last reviewed: Jun 30, 2026

Paramount Peptides sits at the top of the Trusted tier on the strength of 65 Finnrick-tested samples across 8 products. Seven recent purity results span 98. Read full review →

Last reviewed: Jul 18, 2026

Bulk Peptide Supply is one of the more transparent operations in this space: named ownership, a verified physical address, and seven products covered by Finnrick-verified independent testing. Average purity across those seven tests is 99. Read full review →

Last reviewed: Jul 18, 2026

Fifty Freedom Diagnostics COAs confirmed from their live COA library — all from May–June 2026, all passing HPLC-UV and LC-MS identity confirmation. Average purity 99. Read full review →

Last reviewed: Jul 18, 2026

Seven Finnrick-verified HPLC tests across four peptides: BPC-157 (tested three times, 98.80%–99. Read full review →

Last reviewed: Jun 30, 2026

Seventy-seven COAs posted on their independent certifications page — four labs (TrustPointe, Kovera, BioRegen, Chromate), continuous testing from August 2025 through June 2026. Average purity 99. Read full review →

Last reviewed: Jul 18, 2026

Seven Finnrick-verified HPLC tests across four peptides: GHK-Cu (three tests, 99.83%–99. Read full review →

Last reviewed: Jun 30, 2026

Orbitrex has a near-spotless purity record from seven Finnrick-verified tests: 99.8–99. Read full review →

Last reviewed: Jul 18, 2026

EZ Peptides posts third-party lab results confirmed through Finnrick across six tested products, and a physical US address is on file. Most purity results are clean — tirzepatide and GHK-Cu batches run 99. Read full review →

Last reviewed: Jul 18, 2026

Ninety-two Janoshik-verified COAs posted on their test-reports page — 48 distinct compounds, 99.63% average purity, floor of 99. Read full review →

Last reviewed: Jul 18, 2026

Aavant Research posts some of the tightest purity numbers in this database — 99.87% average across seven Finnrick-verified tests, with no result below 99. Read full review →

Last reviewed: Jul 18, 2026

Seven Finnrick tests, all dated February–March 2026: Tirzepatide (two tests, 99.81%–99. Read full review →

Last reviewed: Jun 30, 2026

NextechLabs posts strong purity numbers — 99.69% average across seven Finnrick-verified products — but no browsable COA archive exists on the vendor's own site. Read full review →

Last reviewed: Jul 18, 2026

Peptide Crafters posts third-party COAs for 56 products through Vanguard Laboratory (Olympia, WA), with average purity of 99.57% — among the highest we've verified. Read full review →

Last reviewed: Jul 18, 2026

Nuscience has one of the highest Finnrick testing footprints in this category. Seven recent tests confirm clean purity across the GLP-1 class — Tirzepatide (99. Read full review →

Last reviewed: Jul 18, 2026

Nexaph has 245 Finnrick-tested samples across 10 products — one of the highest independent testing footprints we track. Seven recent tests confirm clean purity across Retatrutide (99. Read full review →

Last reviewed: Jul 18, 2026

Chromate Analytical confirmed T3 — RP-HPLC method, signed by Lucas Weber (Principal Chemist), with batch-specific identifiers and QR-verifiable COA access codes. Seven compounds tested: BPC-157 (99. Read full review →

Last reviewed: Jul 18, 2026

Four Finnrick-verified tests with an average purity of 99.8% and a floor of 99. Read full review →

Last reviewed: Jul 18, 2026

MZ Biolabs confirmed T3 — HPLC-UV-MS method, signed by analyst Ken Pendarvis ChE, with a real chromatogram and QR code for authenticity. 19 compounds tested, average purity 98. Read full review →

Last reviewed: Jul 18, 2026

RUO Science uses Freedom Diagnostics as their primary third-party testing lab — a US-based independent laboratory with a public searchable COA database. Confirmed lot LCARN500-02122026-J passes lookup at FreedomDiagnosticsTesting. Read full review →

Last reviewed: Jul 18, 2026

Seven Finnrick-tested samples confirm clean purity across five peptides: Semaglutide (99.32–99. Read full review →

Last reviewed: Jul 18, 2026

Verified Peptides has 36 Finnrick-tested samples. Seven recent purity results are clean: PT-141 (99. Read full review →

Last reviewed: Jul 18, 2026

Two CJC-1295 batches — lots CJC5-13596 tested May 2025 — came back at 88.99% and 85. Read full review →

Last reviewed: Jun 25, 2026

Loti Labs is one of the more operationally transparent vendors in this space: ownership is publicly disclosed, contact info is listed, a physical address is on file, and Finnrick-verified testing exists. That context makes the CJC-1295 results harder to dismiss. Read full review →

Last reviewed: Jul 18, 2026

Certified Pep scores at 63 — Acceptable — on 15 Vanguard Laboratory COAs covering BPC-157 (99.80%), Semaglutide (99. Read full review →

Last reviewed: Jul 18, 2026

Perfect Peptides scores at 58 — Acceptable — on 8 Chromate Analytical COAs from April 2026. BPC-157 (99. Read full review →

Last reviewed: Jul 18, 2026

Core Peptides uses Vanguard Laboratory — the same ISO/IEC 17025:2017 accredited lab used by Licensed Peptides and Certified Pep — for independent third-party purity testing. All recent COAs (April 2026) are batch-specific, with lot numbers traceable to individual production runs. Read full review →

Last reviewed: Jun 30, 2026

Three independently named third-party labs — ILS Laboratories, Kovera Labs, and Freedom Diagnostics — across six tests averaging 99.7% purity, with a floor at 99. Read full review →

Last reviewed: Jul 18, 2026

Mile High Compounds uses Chromate Analytics — a named third-party lab — across five tested products averaging 99.4% purity, with a floor at 99. Read full review →

Last reviewed: Jul 18, 2026

Horizon Analytical confirmed T3 — UPLC/MS method, signed by Aleksey Yevtodiyenko PhD, with a public verification portal at horizonanalytical.com. Read full review →

Last reviewed: Jul 18, 2026

Peptidology operates from Scottsdale, AZ (11111 North Scottsdale Rd, Suite 205), uses Vanguard Scientific Solutions — an ISO-17025 accredited independent lab — and maintains 171 batch-specific COA documents accessible through their COA library. Purity across reviewed records averages 99. Read full review →

Last reviewed: Jul 18, 2026

Ascension uses Kovera Labs for full-panel COA testing: RP-HPLC purity, LC-MS identity confirmation, endotoxin screening (≤0.5 EU/mL), microbial sterility, and heavy metal panels (As, Cd, Pb, Hg). Read full review →

Last reviewed: Jul 18, 2026

Prime Peptides (Prime Vitality, Inc.) received an FDA warning letter on December 10, 2024 — part of a four-vendor enforcement wave that also targeted Swiss Chems, Xcel Peptides, and Summit Research. Read full review →

Last reviewed: Jul 18, 2026

Seven Finnrick-verified tests covering GHK-Cu, Ipamorelin, Semaglutide, Retatrutide, BPC-157, CJC-1295, and Melanotan II — confirming identity on all products. What's missing: purity results. Read full review →

Last reviewed: Jun 30, 2026

Penguin Peptides sends samples to Janoshik, a well-known independent testing lab, for third-party purity verification. Of the 18 products tested, 17 came back above 95% purity. Read full review →

Last reviewed: Jul 18, 2026

Seven Finnrick identity-only tests covering Melanotan II, Mazdutide, Semaglutide, Tirzepatide, BPC-157, CJC-1295, and Retatrutide. Identity is confirmed for all seven products; purity is not measured for any of them. Read full review →

Last reviewed: Jun 30, 2026

Licensed Peptides uses Vanguard Laboratory (ISO 17025, A2LA accredited) for testing — confirmed via direct document inspection. That's a legitimate, accredited lab. Read full review →

Last reviewed: Jun 30, 2026

Biotech Peptides has a confirmed US physical address, contact info, and a full COA library covering 13 distinct compounds. However, COA documents are self-branded — they do not name a third-party testing lab, so the purity data (all between 98. Read full review →

Last reviewed: Jul 18, 2026

Ownership is disclosed and contact info is public. COA page is active with batch numbers present, though the testing lab is not identified by name in reviewed documents — placing this in unattributed testing territory rather than confirmed third-party. Read full review →

Last reviewed: Jun 30, 2026

Cernum Biosciences COAs are issued by their own internal "Lab Research Department" — not an independent third-party lab. Every product on the site carries the same batch number (201-139-35496), which is not a batch tracking system; it's a template. Read full review →

Last reviewed: Jul 18, 2026

COA documents are on file with batch numbers present, but no testing lab could be identified from the page text or the COA documents themselves during audit — the documents appear to be vendor-branded. Lab names appearing in some test records were found through other means and are not confirmed from the vendor's own documentation. Read full review →

Last reviewed: Jul 18, 2026

No COA page and no lab testing documentation of any kind. Ownership is named. Read full review →

Last reviewed: Jul 18, 2026

No COA page and no lab testing documentation. Contact information is public. Read full review →

Last reviewed: Jul 18, 2026

The vendor's website is no longer accessible. No products, no documentation, and no presence in third-party databases. Read full review →

Last reviewed: Jul 18, 2026

The vendor's website is no longer active. No products, no documentation, no operational presence. Read full review →

Last reviewed: Jul 18, 2026

No COA, no lab testing, no contact info, no address, no ownership disclosure. One of the least-documented vendors in our database. Read full review →

Last reviewed: Jul 18, 2026

Maxx Research Supply has no publicly verifiable information — no product catalog, pricing, lab testing, or company documentation is accessible through any source. The score of 5 reflects a data gap, not confirmed problems. Read full review →

Last reviewed: Jul 18, 2026

Institutional-access-only catalog — products are not publicly purchasable. Listed for completeness. Read full review →

Last reviewed: Jul 18, 2026

Last reviewed: Jun 30, 2026

No documentation of any kind: no COA, no lab testing, no contact info, no address, no ownership. Lowest-documented vendor in our database. Read full review →

Last reviewed: Jul 18, 2026