This article summarizes published peptide research. All content is presented for research reference only and is not intended as medical advice or guidance for personal peptide use. Products referenced are research compounds — not for human consumption, diagnostic or therapeutic application.
Peptides come in two forms:
Lyophilized peptides (powder)
Peptides in solution
Lyophilized peptides: Room temperature: 3-6 months Refrigerator (+2...+8 °C): 12 months Freezer (-20 °C or -80 °C): 24-36 months Keep the vial tightly closed Don't open without need (moisture is destructive) Peptides in solution are less stable Room temperature: 1 month Refrigerator (+2...+8 °C): 3 months Freezer (-20 °C): 6 months What not to do? ❌ Leave in light ❌ Store in a humid place ❌ Open the vial frequently ❌ Shake and heat
Third-party laboratory Certificates of Analysis (COA) for every PEPTEX peptide
Why transparency matters
Research-grade peptides require verified identity and purity. An unverified vial is an unverified experiment.
Each order ships with a physical COA and batch-specific QR code.
Testing methodology
HPLC (purity + impurities), mass spectrometry (molecular mass confirmation), appearance check, and moisture content. Reports issued by EU-based accredited laboratories.
Every batch of PEPTEX peptides is tested by an independent accredited laboratory. All batches meet or exceed ≥99% purity — no exceptions.
Browse certificates by product
Frequently asked questions
What does ≥99% purity mean?
It means that at least 99% of the powder is the target peptide.
How is the batch linked to the COA?
Every vial carries a batch number matching the COA.
Can I verify the COA independently?
Yes — each COA carries the issuing laboratory name and report ID.
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