Our standards
Evidence is the product. “Vetted suppliers” and “documented provenance” are easy to claim, so here is the actual process behind them — what vetting means, what each batch is tested for, and what happens when a batch fails, with a real certificate from current inventory.
The process
- 01
Vet the supplier
Before a compound is listed, we review the manufacturer's synthesis and process documentation and require independent test data — not just the manufacturer's own paperwork. We record the supplier and lot for every product we carry, so each unit traces back to a specific source and run.
- 02
Test every batch independently
We do not rely on the supplier's certificate. Each incoming lot is sampled and sent to an accredited third-party analytical laboratory (currently Janoshik Analytical) for independent characterization. The lot is held — never listed for sale — until its result is back.
- 03
Pass or reject
Identity is pass/fail — a lot whose mass-spectrometry result doesn't match the target peptide is rejected outright, never listed, never blended into a passing lot. For purity we publish the lab's measured figure as-is — no rounding up, no marketing inflation, no weak lot blended into a strong one to clear a number.
- 04
Publish the certificate
A passing lot is listed with its Certificate of Analysis on the product page — purity, batch number, test date, and testing laboratory, plus the lab's report ID where issued. The lot you receive is the lot on the certificate.
What every batch is tested for
HPLC — purity
High-performance liquid chromatography separates the sample into its components and measures the target peptide as a percentage of the whole — the purity figure on every certificate, the lab's measured value, not rounded up to a marketing number. Every lot we currently sell tests at ≥98.9% or higher.
MS — identity
Mass spectrometry confirms the compound is what the label says: the measured molecular mass is matched against the target peptide's expected mass. Purity without an identity check only tells you a sample is clean, not that it's the right molecule.
What we don't claim: our products are lyophilized powders supplied for in-vitro research, not sterile injectables, so sterility and endotoxin (LAL) testing are not part of standard research-use certification and we do not assert them. Identity and purity are what a research buyer can and should verify — and what we publish.
A real certificate
Not a mockup — the most recently tested lot in our catalog, pulled live from the same records the product pages show.
GHK-Cu
Certificate of analysis
- Purity (HPLC)
- 99.6%
- Batch
- GHKCU-2605
- Tested
- 2026-05-12
- Lab
- Janoshik Analytical
The lab's report ID can be verified with the testing laboratory directly — a certificate you can't check is just a picture.
- Tiers
- Compounds are mapped on the family tree with a neutral research-maturity tier (S–F) carried from the source dataset — how extensively a compound is characterized in the literature, never a claim about our products.
- Research use only
- Every product is supplied for laboratory and research use only, and is not for human or animal consumption.