At LGI Peptides, quality is not a marketing claim — it is a documented, verifiable process. Founded by Dr. Ryan Hatch, D.C., our company was built on the belief that the research community deserves complete transparency at every step of the supply chain, from synthesis to delivery.
Advanced Synthesis
Solid-phase and solution-phase synthesis methods ensure precise amino acid sequencing and structural integrity in every batch.6; margin: 0;">Every batch is tested via High-Performance Liquid Chromatography to verify ≥99% purity before it enters our catalog.
Mass Spectrometry
Mass Spectrometry confirms the exact molecular weight and amino acid sequence identity of every compound we sell.
COA Transparency
A Certificate of Analysis is provided with every product, giving you direct access to the batch-specific test results.
Purity Standard
≥99% Purity — Verified, Not Assumed
In the field of peptide science, purity is everything. Impurities can interfere with experimental results, compromise reproducibility, and introduce unwanted variables that invalidate research outcomes.
Our ≥99% purity standard is not self-reported — it is independently verified by accredited third-party laboratories and documented in the Certificate of Analysis that accompanies every product. When you order from LGI Peptides, you receive proof, not promises.
Testing Methodology
Our Multi-Step Verification Process
We do not rely solely on in-house testing. Every batch undergoes comprehensive, independent third-party laboratory verification before it is approved for our catalog.This analytical technique allows us to verify that the target peptide is present at our strict ≥99% purity standard, confirming that no significant impurities remain from the synthesis process. The resulting chromatogram is included in every product's COA.
Step 2: Mass Spectrometry (MS)
Mass Spectrometry confirms the exact molecular weight and identity of the peptide by analyzing the mass-to-charge ratio of its ions. This step verifies the precise amino acid sequence and structural integrity of the compound, ensuring you receive exactly what is labeled on the vial — nothing more, nothing less.
Step 3: Independent Third-Party Verification
All testing is conducted by accredited, independent laboratories with no financial interest in the outcome. This eliminates any potential bias and ensures that our purity claims are objective, verifiable, and trustworthy. Third-party verification is the gold standard in research-grade compound testing.
Step 4: Batch Documentation & Traceability
Every batch is assigned a unique lot number and is fully traceable from synthesis through packaging and delivery. Complete batch records are maintained, ensuring that any product can be traced back to its specific testing data. This level of documentation is what separates a research-grade supplier from a commodity vendor.
What's in Your COA?
- ✓ Product name and lot number
- ✓ Mass Spectrometry molecular weight confirmation
- ✓ Testing laboratory name and accreditation
- ✓ Test date and batch release date
Certificate of Analysis
Complete Transparency, Every Time
A Certificate of Analysis is not an optional add-on at LGI Peptides — it is a standard component of every product we sell. The COA is your proof of quality, providing direct access to the batch-specific testing data that confirms what is in your vial.
You can access the COA for any product directly from its product page. We believe that if a supplier cannot show you the data, you should not trust the product.
From Lab to Your Door
Manufacturing & Handling Standards
Quality control does not end at the laboratory. We maintain strict protocols at every stage to ensure compounds arrive at your facility in optimal research condition.
Precision Synthesis
Advanced solid-phase and solution-phase synthesis methods ensure precise amino acid sequencing.
Lyophilization
Freeze-drying maximizes compound stability, extends shelf life to 24 months, and protects integrity during transit.
Sterile Packaging
Aseptic handling and sealed vials prevent environmental exposure and contamination throughout the process.
Research-Grade Shipping
Insulated packaging with cold packs where required. USPS Priority Mail with same-day processing for orders before 12 PM EST.
Ready to Start Your Research?
Every product in our catalog is backed by the quality standards described on this page. Browse our full selection of research-grade peptides.
Shop All Peptides Contact UsAll products sold by LGI Peptides are intended strictly for laboratory research purposes only. They are not approved for human consumption, medical use, or therapeutic application.