Quality Testing
Our testing process for every batch of Retatrutide research peptide supplied in the UK.
Independent, Not In-House
We do not rely on manufacturer claims or in-house testing. Every batch we stock is sent to Janoshik Analytical, an independent third-party laboratory widely used across the peptide research community, before it is offered for sale.
What Each Batch Is Tested For
- Identity — mass spectrometry confirms the compound is genuinely Retatrutide (LY3437943).
- Purity — HPLC analysis must verify 99%+ purity; anything below this standard is rejected.
- Quantity — the actual peptide content per vial is measured against the labelled amount.
Transparent Results
The resulting Certificates of Analysis are published on our COA page and available per batch on request. Each Janoshik report carries a unique task number that can be verified directly with the laboratory, so you never have to take our word for it.
Questions about a specific batch? Email info@myreta.co.uk or call our free 24-hour line on 0330 043 3184.
Browse our independently tested Retatrutide UK range, or use the free Retatrutide calculator for reconstitution maths.
All products are supplied strictly for research and laboratory purposes only.