Every lot of every peptide we sell undergoes seven independent analytical tests at an ISO/IEC 17025:2017 accredited laboratory. Testing methods are FDA, USDA, USP, and EPA compliant. Every shipment includes a lot-specific Certificate of Analysis, QR-linked and third-party hosted. This page documents exactly how that works.
The independent laboratory we partner with offers three tiers of verification. We ship only at the highest tier, Elite Certified. Here's how the tiers compare.
US Certified Peptides ships ONLY at the Elite Certified tier.
We do not sell Verified or Validated tier products. The highest standard is the only standard.
Each lot is tested across these seven analytical and safety endpoints by independent ISO/IEC 17025:2017 accredited methods. Each test is documented below with its purpose, methodology, and pass criteria.
High-performance liquid chromatography (HPLC) separates the peptide compound from any synthesis impurities, truncation products, or degradation byproducts. Each lot must achieve greater than 98% purity to receive Elite Certification. Lots below 98% are rejected and do not ship.
Independent gravimetric and quantitative verification that the actual peptide mass in each vial matches the labeled quantity. Researchers can dose-accurately knowing the labeled mg is the actual mg. No estimation, no approximation.
Mass spectrometry confirms the peptide's molecular weight and sequence identity. The compound in the vial is verified to be precisely the peptide named on the label, not a similar sequence, not a related compound. Identity is confirmed.
Every vial carries a unique QR code. Scanning links directly to that specific lot's Certificate of Analysis, hosted by the independent third-party laboratory. No middleman, no editing, no possibility of forged documentation.
Limulus Amebocyte Lysate (LAL) testing screens for bacterial endotoxins introduced during synthesis or handling. Endotoxins can confound research results, especially in cell culture and in vivo models. Elite Certified peptides meet pharmaceutical-grade endotoxin thresholds.
Screens for residual heavy metals (lead, arsenic, cadmium, mercury) potentially introduced during synthesis, reagent contact, or storage. Each lot is tested against pharmaceutical heavy metal limits before release.
Microbial contamination screening, essential for any peptide used in sterile research applications including cell culture. Each lot is tested for total aerobic microbial count and yeast/mold.
No lot ships without passing all seven tests.
No exceptions.
These four regulatory frameworks define the analytical methods used to verify every lot. Each framework is explained below in the context of peptide research testing.
FDA Guidance for Industry establishes standards for analytical method validation, identity testing, and impurity profiling. Elite Certification testing follows FDA-recognized methodologies for peptide characterization, including mass spectrometry identification and HPLC purity quantification.
USDA standards apply to research chemicals and biological products derived from agricultural processes. Elite Certification testing aligns with USDA APHIS protocols where applicable, particularly for residue testing and contamination screening.
USP general chapters define the analytical procedures used across Elite Certification testing. The seven-point panel directly references USP standards for HPLC, mass spectrometry, microbial testing, endotoxin testing, and elemental impurity analysis.
EPA standards govern laboratory practices for environmental contamination testing and analytical quality control. Elite Certification testing applies EPA-validated methods for heavy metal detection and trace contamination analysis.
Four regulatory frameworks. Seven analytical tests.
One standard.
Every shipment includes a lot-specific Certificate of Analysis (COA) generated by the independent testing laboratory. Below is an annotated sample showing exactly what you receive.
| TEST | METHOD | RESULT | STATUS |
|---|---|---|---|
| HPLC Purity | USP <621> | 99.2% | PASS |
| Quantity QC | USP <41> | 10.04 mg | PASS |
| Mass Spec | USP <736> | 4,729.4 g/mol | PASS |
| QR-Verified COA | ISO 17025 | Active | PASS |
| Endotoxin (LAL) | USP <85> | <0.5 EU/mg | PASS |
| Heavy Metals | USP <232> | Below limit | PASS |
| Bioburden | USP <61>/<62> | <10 CFU/g | PASS |
Every COA is tied to a unique lot number that matches the vial in your hand.
Generated by the ISO/IEC 17025:2017 accredited laboratory, not by US Certified Peptides.
Each of the seven Elite Certification tests appears with its method, result, and pass/fail status.
Every test cites the specific analytical method used (USP, ISO, EPA reference codes).
Scan the QR code to verify the COA's authenticity against the laboratory's hosted record.
Every COA is signed and dated by the laboratory's authorized signatory.
Each peptide moves through a six-stage chain of custody from synthesis to your laboratory. Each stage is documented, verified, and signed off before the next begins.
Peptide is manufactured to research-grade specifications by a qualified production partner. Raw materials are traced and documented at intake.
Peptide is manufactured to research-grade specifications by a qualified production partner. Raw materials are traced and documented at intake.
Initial in-house quality control screen verifies the lot is suitable for third-party testing. Substandard lots are rejected before external testing begins.
Initial in-house quality control screen verifies the lot is suitable for third-party testing. Substandard lots are rejected before external testing begins.
Each lot is sent to the independent ISO/IEC 17025:2017 accredited laboratory for the full seven-point test panel.
Each lot is sent to the independent ISO/IEC 17025:2017 accredited laboratory for the full seven-point test panel.
Returned COA is reviewed against pass criteria. Only lots meeting all seven Elite Certification thresholds proceed to packaging.
Returned COA is reviewed against pass criteria. Only lots meeting all seven Elite Certification thresholds proceed to packaging.
Verified peptides are sealed in tamper-evident vials. Each vial is labeled with a unique lot number and QR code linking to its specific COA.
Verified peptides are sealed in tamper-evident vials. Each vial is labeled with a unique lot number and QR code linking to its specific COA.
Each order ships via tracked courier with cold-chain handling. Tracking and chain-of-custody documentation accompanies every shipment to the researcher's laboratory.
Each order ships via tracked courier with cold-chain handling. Tracking and chain-of-custody documentation accompanies every shipment to the researcher's laboratory.
From synthesis to your lab, every stage documented.
We do not test our own products. Every Elite Certification COA is generated by an independent ISO/IEC 17025:2017 accredited quality assurance laboratory.
ISO/IEC 17025:2017 is the international standard governing the competence of testing and calibration laboratories. Accreditation requires demonstrated methodological rigor, calibrated instrumentation, documented procedures, and reproducible results. It is not self-claimed. It is independently audited.
Vanguard Laboratory serves as our Elite Certification testing partner. Their ISO/IEC 17025:2017 accreditation is publicly verifiable through international accreditation bodies.
The most common questions about Elite Certification, our testing standards, and what comes with every order.
Elite Certified is the highest tier of independent third-party verification for research peptides. Each lot undergoes seven analytical tests at an ISO/IEC 17025:2017 accredited laboratory: HPLC purity, confirmed quantity QC, mass spectrum analysis, QR-verified COA generation, endotoxin (LAL) safety, heavy metal screening, and pass/fail bioburden testing. Only lots passing all seven tests receive Elite Certification and ship to researchers.
ISO/IEC 17025:2017 is the international standard for testing and calibration laboratory competence. Accreditation is independently audited and requires demonstrated methodological rigor, calibrated instrumentation, documented procedures, and reproducible results. A laboratory cannot self-declare ISO/IEC 17025 accreditation. It is granted only after rigorous evaluation by accreditation bodies. When you see an ISO/IEC 17025-generated COA, you know the data is methodologically sound.
Most research peptide suppliers run a single HPLC test in-house or contract a basic purity check. Elite Certified runs seven independent tests covering identity, purity, quantity, sterility, endotoxin, heavy metals, and bioburden. The testing is performed by an external ISO/IEC 17025-accredited laboratory, not by us. Each lot receives a unique Certificate of Analysis hosted by the testing laboratory, with QR code verification. This level of testing is uncommon outside pharmaceutical-grade settings.
Every vial we ship carries a unique QR code on its label. Scanning the QR code with your phone links directly to that specific lot's COA, hosted by the independent testing laboratory. The COA is not hosted by US Certified Peptides. We cannot edit or alter the COA. If a COA appears valid, it is. If a vial's QR code does not resolve to a live COA, the product is not Elite Certified.
Elite Certification testing methods are compliant with four U.S. regulatory frameworks: FDA Guidance for Industry, USDA APHIS protocols, USP general chapters, and EPA analytical methods. Each of the seven tests cites the specific regulatory method used. Full method references appear on every COA.
No. We do not test our own products. All Elite Certification testing is performed by an independent ISO/IEC 17025:2017 accredited laboratory. We commission the testing, we receive the COAs, and we ship only lots that pass. We are not the laboratory. This independence is critical to the integrity of the certification.
Lots that fail any of the seven tests are rejected and do not ship. They are returned, destroyed, or used for internal R&D purposes only. We do not sell partial-pass lots. We do not sell lots that meet six of seven tests. The standard is all seven, every time.
Full seven-point testing typically takes 5 to 10 business days per lot, depending on test queue and method complexity. This testing window is built into our supply chain, which is why we maintain inventory of Elite Certified lots rather than testing on demand.
Yes. A sample COA is available for download on this page in the section above. Every actual COA you receive follows the same format with your lot's specific results.
No. All products sold by US Certified Peptides are intended strictly for laboratory research use only. They are not intended for human consumption, diagnostic application, or therapeutic use. Sales are limited to qualified research professionals.
Twelve research peptides, all Elite Certified, all in stock. Every order ships with its lot-specific Certificate of Analysis and QR-verified label.