Source Check · Transparency
CoA Library
Every batch we dispatch from the UK ships with a Certificate of Analysis available on request — HPLC purity and mass-spectrometry identity, signed and dated by batch.
HPLC Purity
≥98%
Identity
Mass Spec
Per Batch
Signed CoA
How to request a CoA
- Note the product name and, if available, your order number.
- Email hello@professorpeptide.co.uk with the subject line "CoA request — [Product Name]".
- We reply with the signed PDF within one working day (usually same day).
Batch scans (Janoshik Analytical third-party test reports) are hosted on the individual product page — open the product you're researching and use the View Batch CoA button. For any batch not yet published, email us and we'll send the signed PDF within one working day.
Featured compounds with batch CoA on request
Semaglutide
GLP-1 / Metabolic
Synthetic GLP-1 analogue for biochemical receptor research.
Tirzepatide
GLP-1 / Metabolic
Dual GIP and GLP-1 receptor agonist for incretin research.
Retatrutide
GLP-1 / Metabolic
Triple-agonist incretin investigated in metabolic research.
BPC-157
Healing & Repair
Pentadecapeptide derived from a protective protein in gastric juice.
TB-500 (Thymosin β4 Acetate)
Healing & Repair
Synthetic analogue of the naturally occurring Thymosin Beta-4.
Ipamorelin
Growth Factors
Selective ghrelin receptor agonist for endocrinology research.
CJC-1295 No DAC 5 mg + Ipamorelin 5 mg
Blends
Classic GH research blend.