Analytical standards
Quality & testing
Research is only as reliable as the material behind it. Every lot we release is independently analysed and documented, so you can trace exactly what is in the vial on your bench.
Identity — mass spectrometry
Each lot is confirmed by LC-MS against the expected molecular mass before release. Deviating lots are quarantined and destroyed.
Purity — HPLC
Reverse-phase HPLC establishes purity for every batch. We publish the chromatogram alongside the Certificate of Analysis for the lot you receive.
Screening
Lots are screened for residual solvents, water content and bacterial endotoxin where the assay is applicable to the compound.
Cold-chain handling
Peptides are stored lyophilised at -20°C and dispatched in insulated packaging with a temperature-stable gel pack.
Third-party testing
Published test reports
Independent assays from Janoshik Analytical. Each report can be verified with the unique key printed on it.
Retatrutide 20mg
- Laboratory
- Janoshik Analytical
- Task number
- #148972
- Reported purity
- 99.397%
- Analysis conducted
- 18 May 2026
GHK-Cu 50mg
- Laboratory
- Janoshik Analytical
- Task number
- #194420
- Reported purity
- 99.919%
- Analysis conducted
- 20 July 2026
Requesting a Certificate of Analysis
The lot number is printed on the vial label and repeated on your dispatch note. Email the lot number to lab@helixresearchlabs.co.uk and we will return the corresponding CoA and HPLC trace within one working day.
Certificates describe analytical characteristics only. They are not a safety assessment, and they do not imply suitability for any use other than in vitro laboratory research.