Directory of Peptide Testing Laboratories

This directory lists analytical testing laboratories that research peptide vendors and buyers commonly reference. It is neutral and unranked — we do not rate labs or endorse specific testing services. Each entry includes only information confirmed from the lab's own official website as of October 2026.

Before engaging a lab:

• Verify current services, pricing, turnaround times, and sample requirements by contacting the lab directly.
• Confirm accreditation status through the accreditation body's public database (not just the lab's website).
• Ask for a written quote and report template to understand what will be delivered.
• If you are verifying a COA, see how to verify peptide COA authenticity.

PurePep Vital does not test products or independently audit these laboratories. This directory is informational only. For how we compare vendor-reported documentation, see our methodology.

Peptide testing typically includes the following methods. Not all labs offer all services, and not all peptides require every test.

HPLC (High-Performance Liquid Chromatography)

Quantifies purity by separating the target peptide from synthesis-related impurities. Common modes include reversed-phase (RP-HPLC), ion-exchange (IEX), and hydrophilic interaction (HILIC). Purity is reported as a percentage (e.g., 98.5%).

Mass Spectrometry (MS, LC-MS, LC-MS/MS)

Confirms peptide identity by measuring molecular weight and, in some cases, sequencing peptide fragments. Essential for verifying you received the correct compound, not just a pure substance.

Amino Acid Analysis (AAA)

Determines amino acid composition and can detect substitutions or missing residues. Useful for sequence verification, especially for novel or custom peptides.

Endotoxin Testing (LAL assay)

Measures bacterial endotoxin levels, relevant for peptides used in cell culture or in vivo models. Typically reported in endotoxin units per milligram (EU/mg).

Peptide Mapping / Sequencing

Enzymatic digestion followed by LC-MS/MS analysis to confirm full amino acid sequence and detect post-translational modifications or synthesis errors. More comprehensive than intact mass spectrometry alone.

Other methods

Some labs offer moisture content (Karl Fischer titration), residual solvents (GC), heavy metals (ICP-MS), sterility testing, and stability studies. Confirm availability and scope with the lab.

For interpreting these results, see how to read a peptide COA.

The following laboratories have been confirmed to offer peptide or small-molecule analytical testing services. Information is from official websites; verify current services directly with each lab. Listed alphabetically.

Colmaric Analyticals

Website: colmaricanalyticals.com

Location: St. Petersburg, Florida, United States

Services confirmed: Peptide testing including HPLC purity analysis, mass spectrometry for identity and molecular weight, TLC for rapid identity checks, amino acid analysis, and chemical characterization. USP compendial methods, method development, and validation services.

Accreditation: ISO/IEC 17025:2017, PJLA accreditation No. 86258 (certificate L26-384). The accredited scope lists HPLC-UV/DAD assays for caffeine, niacinamide, pyridoxine HCl and thiamine HCl; peptide testing is not on the accredited scope.

Sample submission: Quote-based; engagement starts with a discovery call. Aimed at manufacturers and distributors; individual researcher acceptance not stated on website.

Notes: Pricing and turnaround not publicly listed.

Eurofins

Website: eurofins.com (multiple divisions; peptide services under BioPharma Product Testing and CDMO Biologics)

Locations: Global network with facilities in Europe, North America, and Asia. Specific peptide services available through Eurofins BioPharma Product Testing locations.

Services confirmed: Comprehensive peptide characterization including RP-HPLC, ion-exchange (IEX), HILIC, size exclusion chromatography (SEC), high-resolution mass spectrometry (LC-HRMS), capillary electrophoresis, chiral amino acid analysis, peptide mapping, impurity identification, method development and validation (ICH-compliant), stability testing, and forced degradation studies.

Accreditation: Multiple Eurofins laboratories are GMP/GLP/GCP-compliant and FDA-inspected. ISO/IEC 17025 accreditation varies by facility; confirm with the specific location you engage.

Sample submission: Pharmaceutical and biotech-focused; contact through website inquiry form or regional sales offices. Aimed at IND/NDA/BLA support, not single-vial consumer verification.

Notes: Large multinational network. Services span preclinical through commercial-stage pharmaceutical development. Pricing and timelines are quote-based for custom projects.

Intertek Pharmaceutical Services

Website: intertek.com/pharmaceutical (peptide services under biopharmaceuticals section)

Locations: Global network with pharmaceutical facilities in England, USA, and other regions.

Services confirmed: Peptide identity and sequence confirmation using LC-MS/MS peptide mapping, HPLC/UPLC (reversed-phase, normal-phase, HILIC), impurity profiling, product-related impurity isolation and characterization, primary structure analysis, higher-order structure (CD, FTIR, NMR), method development and validation, and GMP/GLP-compliant testing.

Accreditation: Facilities are GLP/GCP and cGMP-inspected by regulatory authorities (FDA, EMA). Confirm ISO/IEC 17025 status for specific locations and test methods with Intertek directly.

Sample submission: Pharmaceutical development-focused; engagement through project inquiry form. Aimed at CMC programs, biosimilar comparability, and method transfer, not individual retail vial verification.

Notes: Services support IND/NDA/BLA filings and are designed for therapeutic peptide developers.

Janoshik Analytical

Website: janoshik.com

Location: Not publicly stated on website (mail-in service with international sample acceptance)

Services confirmed: Peptide purity and composition analysis via HPLC and LC-MS, including GLP-1 peptides (semaglutide, tirzepatide, retatrutide), growth hormone secretagogues, recovery peptides (BPC-157, TB-500), neuropeptides, and many others. Janoshik states an average routine turnaround of under 2 days from sample receipt (help.janoshik.com). Rush testing available.

Accreditation: Accreditation status not stated on website as of October 2026.

Sample submission: Online order system with credit card, crypto, and multiple payment methods. Worldwide sample acceptance. Pricing listed per test on website (e.g., BPC-157 analysis, common GLP-1 blind test).

Verification services: Public verification portal at janoshik.com/verification/ and public test database at public.janoshik.com where reports can be independently verified via QR code or report ID.

Notes: Widely used in the research peptide market. Focus on quality verification for individual submitters and small vendors, not pharmaceutical regulatory submissions.

SGS

Website: sgs.com (peptide services under BioPharma and Life Sciences divisions)

Locations: Global network with pharmaceutical testing facilities in Europe, North America, and Asia.

Services confirmed: Peptide/protein primary structure characterization (composition, sequencing, PTMs) using Edman degradation, LC-MS/MS, NMR, UPLC, and electrophoresis. Higher-order structure (FT-IR, SEC-MALS, CD, DLS, DSC, AUC), functional assays, QC and stability testing (identity, potency, purity, safety), compendial testing (pH, osmolality, bioburden, endotoxin), and ICP-MS for metals.

Accreditation: GMP/GLP/GCP-compliant and FDA-inspected facilities. ISO/IEC 17025 and other quality standards vary by location; confirm with the specific facility.

Sample submission: Pharmaceutical and biotech-focused; contact through regional offices or website inquiry. Designed for drug development programs (preclinical through Phase IV), not single-vial retail verification.

Notes: Services support regulatory filings and biosimilar comparability studies.

Consider the following when selecting a laboratory:

• Accreditation and regulatory standing: ISO/IEC 17025 accreditation is a strong signal of technical competence. For pharmaceutical development, GMP-compliance and FDA inspection history may also matter. Verify accreditation through the accrediting body's public database.
• Scope of services: Does the lab offer the specific tests you need (e.g., HPLC purity, MS identity, endotoxin, peptide mapping)? Some labs offer full characterization suites; others focus on purity and identity only.
• Turnaround time and cost: Turnaround and pricing vary widely by lab. Janoshik states an average routine turnaround of under 2 days from sample receipt (help.janoshik.com). Pharmaceutical contract labs may take several weeks. For cost, check each lab's website for published pricing or request written quotes.
• Client type: Some labs serve pharmaceutical companies and require institutional contracts; others accept individual researchers or small vendors. Confirm you meet their client criteria.
• Verification services: If you need to verify a COA later, labs with public verification portals (like Janoshik) make this easier. Labs without portals may still confirm reports via email but may have confidentiality policies.
• Geographic and shipping considerations: International sample shipping can add cost and complexity. Confirm the lab accepts samples from your location and what shipping/customs documentation is required.

For guidance on what to verify once you have a COA, see how to verify peptide COA authenticity.

As covered in the COA verification guide, there is a distinction between independent third-party testing (the labs listed in this directory) and vendor-run (in-house) testing.

Third-party labs have no financial interest in whether the peptide passes or fails testing. This reduces bias and is generally preferred for critical research applications or institutional procurement.

Vendor-run labs test their own products. This can still be rigorous, especially for established manufacturers with transparent methods, but lacks independent verification.

When a vendor provides a COA, confirm whether it was generated in-house or by one of the independent labs listed here. If in-house, that is not inherently fraudulent, but it carries less third-party assurance.

For comparing peptide vendors on documentation practices, see our peptide vendor comparison and vendor comparison pillar.

If you received a COA that references one of these laboratories, you can use this directory as a starting point for verification:

1. Confirm the lab's website and contact details match what is listed here and on the COA.
2. Check if the lab offers a verification portal (e.g., Janoshik does; most pharmaceutical labs do not).
3. If no portal, contact the lab using the official contact information from their website (not from the COA alone) and provide the report ID, batch number, and test date to confirm they issued the report.
4. Verify accreditation claims through the accreditation body's public database if the COA states the lab is ISO/IEC 17025 accredited.

For a full COA verification checklist, see how to verify peptide COA authenticity. For interpreting the analytical results themselves, see how to read a peptide COA.