Buying peptides for research calls for care: quality varies greatly between suppliers. This guide explains what to look for — from purity and documentation to independent verification — so you can make an informed choice.
When buying peptides, check purity (≥99%), a public COA per batch, independent lab verification and the ability to check the lot number. For research only.
1. Check the purity
Research-grade peptides should ideally have a purity of ≥99%. That value is measured with techniques such as HPLC and mass spectrometry. New to peptides? First read what peptides are.
2. Ask for a COA per batch
A reliable supplier shares a Certificate of Analysis for every batch with the measured purity and identity. Learn how to read one in how to read a COA, and view the public certificates per lot number.
3. Check independent verification
Independent analysis by an external lab adds certainty beyond the seller's claim. At Peptide Lab you can also verify any lot number and review the quality standards.
4. Watch legality and framing
Buy peptides as research material from a supplier that clearly communicates research-only. Read about the framework in are peptides legal, and start your selection in the shop.
Peptide Lab supplies peptides for laboratory and research purposes only. Not for human or animal consumption, not a medicine and not medical advice.
Frequently asked questions about buying peptides
What should I look for when buying peptides?
Purity (ideally ≥99%), a public COA per batch, independent lab verification and the ability to check the lot number. Only buy from a supplier that transparently shares this documentation.
What is a COA and why does it matter?
A Certificate of Analysis shows the measured purity and identity of a batch. Without a COA you do not know what you are buying. Every batch at Peptide Lab has a public certificate.
Are peptides legal to buy?
In the Netherlands, research peptides are legally available as research material (research-only), not for human consumption. Read the research-only framework for the details.
Why buy from Peptide Lab?
All products are lab-verified, with a public COA per lot number, independent analysis via Janoshik and a lot verification tool. For research purposes only.
