Black Friday.Buy One,Get One Free.
Every vial you buy comes with a second one of the same vial FREE, added to your cart automatically. No limit. Buy 5, get 5 free, through Nov 16.
Ending soon
Buy 1, Get 1 Free ends Monday, Nov 16 at midnight ET. After that, every vial goes back to full price.
Research Peptides
Our most-ordered compounds first. Search to find anything in the catalog.
Every batch, 8× tested.
No in-house rubber stamps. Eight separate analytical assays, performed by accredited third-party laboratories, signed onto the COA tied to every lot number we ship.
- 01Pass
Purity
HPLC-UV quantification against certified reference material.
- 02Pass
Content Verification
Mass and concentration verified to labeled potency.
- 03Pass
Identity Confirmation
Mass spectrometry confirms exact molecular structure.
- 04Pass
Heavy Metals Screening
ICP-MS screen for Pb, As, Cd, Hg below USP <232> limits.
- 05Pass
Sterility Testing
USP <71> compliant sterility screen on every fill.
- 06Pass
Endotoxin Testing
LAL kinetic chromogenic assay, < 0.5 EU/mg.
- 07Pass
Batch Conformity Verification
Independent batch review confirming every lot matches its release specification and COA.
- 08Pass
Fentanyl Screen
LC-MS/MS screen confirms no fentanyl or fentanyl analog contamination.
A higher standard, documented end-to-end.
Most research suppliers ask for trust. We hand you the proof.
Eight-stage testing
Identity, potency, purity, fentanyl screen, stability, sterility, endotoxin, and batch consistency — every lot, no exceptions.
Transparent documentation
Every order arrives with a downloadable COA. Look up any batch from the public verification portal.
US-based 8× testing
Every lot is independently analyzed by accredited US laboratories, with full chain-of-custody records on the COA.
Independent third-party verification
We don't test ourselves. Every batch is verified by an accredited external laboratory partner.
Eight stages before a vial leaves the building.
A documented, repeatable verification pipeline applied to every single lot.
Synthesis
Solid-phase synthesis in our US facility.
Identity (LC-MS)
Mass spectrometry confirms molecular weight and sequence.
Purity (HPLC)
Quantitative analysis verifies ≥99% chromatographic purity.
Sterility
USP <71> sterility screen on every fill.
Endotoxin
LAL kinetic chromogenic assay against contamination.
Stability
Accelerated and real-time stability across the shelf life.
Consistency
Tolerance windows enforced batch-to-batch.
Documentation
Every result published in a lot-specific COA.
Look up any batch. Read every result.
Type any lot number from a Refined Biolabs vial to pull the full certificate of analysis — identity, purity, sterility, endotoxin, and stability data, signed by the testing laboratory.
- Independent third-party laboratory
- Signed digital COA per lot
- Public batch verification portal
- Permanent record retention
Certificate of Analysis
Certificates publishing soon
Batch certificates are published here as each lot clears independent testing.
New lots and lab notes, first.
One short email a month: what's back in stock, freshly published COAs, and verification updates.
- Restock alerts
- New COA releases
- Methodology notes
Frequently asked.
Still have a question? See the full FAQ or contact us.