Every compound is verified by HPLC-MS to confirm the target peptide is present and correctly identified before release.
Purity Tested
Assay and content testing confirms the labeled dose per capsule. Our peptide capsules meet a minimum 98% purity standard.
Third-Party Verified
All testing is conducted by an independent ISO 17025-accredited analytical laboratory — not by us. No conflicts of interest.
Testing Methodology
How we verify every batch
For encapsulated research peptides, raw purity figures alone are insufficient. Our COA process tests for identity, assay content, and contaminants — giving researchers the complete picture they need.
HPLC-MS Identity Testing
High-performance liquid chromatography–mass spectrometry confirms the molecular identity of each compound.
Assay / Content Verification
Confirms the labeled amount per capsule is accurate within acceptable variance for research applications.
Heavy Metals & Contaminants
ICP-MS screening for heavy metals and residual solvents ensures each batch is free from harmful impurities.
Microbial Limits
USP <61> microbial enumeration testing performed on every production batch.
Current Batch Documentation
COA Reports
Batch Transparency
Every Captide Labs batch is assigned a unique lot number. COA documentation is updated with each new production run. If you need the COA for a specific lot number on your order, contact us with your order number and we’ll provide it directly.
About Our Testing
Third-party tested research peptide capsules
Captide Labs supplies third-party tested peptide capsules for qualified researchers and academic investigators. Every compound — including GHK-Cu, TB-500, BAM-15, Orforglipron, Dihexa, and our GLOW Blend — undergoes independent laboratory analysis before it ships. Our certificates of analysis are published here and updated with every new production batch.
Unlike raw peptide powders where purity is straightforwardly measured, encapsulated research peptides require assay and content testing to confirm the labeled dose is present and accurate. This is the standard Captide Labs holds itself to — and why every COA includes identity confirmation, content assay, heavy metal screening, and microbial limits testing.
FAQ
Frequently Asked Questions
What is a Certificate of Analysis (COA)?
A Certificate of Analysis is a document issued by an independent laboratory that confirms the identity, purity, and safety of a compound. For research peptides, a COA typically includes identity confirmation via HPLC-MS, assay/content testing to verify the labeled dose, and screening for heavy metals, residual solvents, and microbial contamination.
Are your peptides third-party tested?
Yes. All Captide Labs peptide capsules are tested by an independent, ISO 17025-accredited analytical laboratory. We do not conduct testing in-house — third-party testing eliminates conflicts of interest and ensures results are objective and verifiable.
What purity levels do your peptides meet?
All Captide Labs compounds meet a minimum 98% purity standard as verified by HPLC analysis. For encapsulated products, we additionally test assay/content to confirm the labeled milligram amount per capsule is accurate.
How do I read a peptide COA?
Look for three key sections: (1) Identity — confirms the compound is what it claims to be via HPLC-MS; (2) Assay/Purity — the percentage of the target compound present; (3) Limits testing — screens for heavy metals, residual solvents, and microbial contamination. All results should include the test method used and a pass/fail designation against a defined specification.
How often are COAs updated?
COAs are updated with every new production batch. Each batch is assigned a unique lot number. If your order references a lot number not shown here, contact us with your order details and we will provide the corresponding COA directly.
Are these products approved for human use?
No. All Captide Labs products are supplied strictly for in-vitro research and academic investigation. They are not approved by the FDA and are not intended for human consumption, veterinary use, or any other application outside of laboratory research.
All Captide Labs products are intended for laboratory and research purposes only. They are not for human consumption, veterinary use, or food/agricultural applications. Not evaluated or approved by the FDA. Not intended to diagnose, treat, cure, or prevent any condition.
